Method Statement for Blockworks/Masonry

This method statement for blockworks/masonry describes the process to be implemented during the entire activity. This activity uses materials such as concrete masonry units, hollow blocks, solid blocks, insulated blocks, lightweight blocks, glass units, etc. Since every project has its own specifications, thus it is imperative to base the process solely on the approved specifications. The method that will be mentioned here deals only with one specific example applicable to one project. It should not be considered as the generic method but nonetheless, it implies the common procedure for block work construction. This data can be formatted to help the Technical Department/QA Department prepares the required Method Statement for Blockworks which is being submitted to Consultant for review and approval as part of project’s QA documentation.

Check out also the related succeeding activity of method statement for plastering work which also helpful in fulfilling the project documentation requirements.

blockworks-laying
Blockworks laying activity
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Method Statement for Blockworks

I. Description of Works
1. Introduction
2. Definitions
3. Reference
4. Responsibilities
5. Interfacing with Other Operations
6. Duration, Phasing with the Subcontractors
7. List of Subcontractors
II. Resources
1. Plant and Equipment
2. Work Force
3. Light Tools
III. Materials
1. Aggregates
2. Cement (OPC & SRC)
3. Water
4. Concrete Masonry Unit (CMU) Blocks
5. Wall ties and metal lath for block wall stiffeners
6. Glass Units
7. Approved Mortar mix
8. Approved Concrete Mix for the Lintel Work
9. Approved Curing Compound
IV. Site Planning
1. Preparation
2. Site Clearance
3. Traffic Management
4. Pre-construction Safety Meetings
5. Operating Procedures
V. Methodology
1. General
2. Concrete Lintel
3. Mortar, Grout
4. Masonry Blockwork
4.1 General
4.2 Blockwork Laying
4.3 Joints
4.4 Controlling Reducing Temperature of Constituent Materials
5. Sampling and Testing
VI. Risk Assessment and Job Hazard Analysis
VII. Permit and Licensing Requirements
VIII. Drawings, Diagrams and Maps
IX. Pre-Start Safety Briefing Arrangements
1. Protective and Safety Equipment
2. Information to Personnel
3. Special Safety Requirements
4. Emergency Procedures
5. Emergency Contact Numbers
X. Supervision and Monitoring Arrangements
Construction Manager
Site Engineer
Site Foreman
QA/QC Engineer
HSE Engineer
Chief Surveyor
XI. Environment and Quality Issues
1. Precautionary Measure
2. Disposal Requirements
3. Inspection, Test and Sampling
4. Quality Assurance Requirements Table
XII. Attachments
1. Risk Assessment
2. Reference Documentation
3. List of Appendices
APPENDIX A: Drawings, Diagrams, and Maps
APPENDIX B: Risk Assessment
APPENDIX C: Permit & Licensing Requirements Permit to Work
APPENDIX D: Inspection & Testing Plan (ITP)
APPENDIX E: QC Formats
APPENDIX F: Material Safety Data Sheet & Test Certificates of Materials
APPENDIX G: Approved Material Submittals

I. Description of Works
1. Introduction

This Method Statement defines the sequence and describes the control procedures to be followed for Architectural Finishes – Blockworks for Project xxxxx. The purpose of this Method Statement is to establish the rules to be applied during all the types of masonry block works including, lintel/sill, stiffener for column in block work, horizontal and vertical expansion/movement joint. This method statement covers different stages of construction like storage of materials, preparation of mortar, workmanship of construction, testing of materials and execution, preparation of trial panel, cleaning and curing, etc. to ensure that all the masonry block work is properly executed in accordance with Project Specification and applicable standards.
2.Definitions
• SE Site Engineer
• QC Quality Control Engineer
• SF Site Foreman
• PM Project Manager
• SA Site Agent representative from the Lab
• HSE Manager Health, Safety & Environmental Manager
• HSE Officer Health, Safety & Environmental Officer
• Project Management
• Supervising Consultant
• Main Contractor
• Project Specifications
• GIS Geographical Information System
• QCP Quality Control Plan
• HSE Plan Health, Safety and Environment Plan
• TSTI: Total Safety Task Instruction
Note: All dimensions are in mm unless specified. All temperature values are in degree
centigrade unless specified.
3. References
Information sources may include, but not be limited to, verbal or written and graphical instructions, signage,blockworks schedules/ drawings/specifications, work bulletins, charts and hand sketches, and Material Safety Data Sheets (MSDS). All masonry block works shall comply fully with the applicable laws, client’s requirements and specification as per Project Specifications.
4. Responsibilities
The responsibility for inspection and testing of masonry blockworks rests primarily with the Site Engineer and Discipline Foreman with assistance from an audit by the Site Agent and Inspectors.
The Site Engineer and Discipline Foreman shall ensure that the required Quality Control procedures and forms are available in place on a daily basis. Similarly, they shall ensure that the needed drawings are of latest revisions.
The HSE inspection shall take place before masonry blockworks start to ensure that the work area is safe i.e. adequate access, adequate illumination if working on night shift, checking the formwork and supports, scaffold inspections, etc. if applicable.
Project Manager
Responsible for accomplishing the stated project objectives which include creating clear and attainable project objectives, building the project requirements, and managing the constraints of the project management triangle, which are cost, time, scope, and quality. The Project Manager shall be responsible for the ensuring that the Project Quality plan and the Inspection and Testing procedures, method statement, HSE safety and all contractual documentation are maintained up to date and accessible to all parties.
Construction Manager
Responsible for overall construction activities ensuring that all method statement, quality, and safety procedures are implemented and required approval permits are obtained.
Site Engineer
Supervise operations in accordance with the approved Method Statement for blockworks, shop drawings, specifications, material submittals, and schedules to achieve the acceptance of the project deliverables.
Site Supervisor
Supervise closely, the activities designated to them and ensure that all instructions and safety procedure are followed and strictly adhered to. Supervise the work to ensure that technical, quality, safety and purchase order requirements are met; Attend daily site meeting and communicate his daily report with the Project/Site Engineer; Participate in training and development of his subordinates; Organize with the Project/Site Engineer to ensure the availability of plant, equipment and labor to his designated work activities; Closely monitor the usage of consumables and materials by his crew in order to minimize wastage; Assess craftsmanship of subordinates under his control.
Site Foreman
To liaise with the Site Engineer and Supervisor for the work execution.
QA/QC Engineer
Ensure the proper implementation on the Quality system and monitor overall quality of the work is maintained. Conduct inspection and monitor tests. Determine and report any non-conformance and recommended corrective actions. Ensure that all personnel is aware of the quality requirement.
Training of relevant personnel.
Conduct surveillance and inspection duties at various stages to ensure compliance to QA/QC Plan.
H.S.E. Manager 
Health, safety, and environmental (HSE) managers generally plan, coordinate and implement issues and directives within the organization. They ensure safe environmental working conditions for all employees.
H.S.E. Officer 
Ensure enforcement of safety procedures in accordance with the approved HSE Plan. Will be closely monitoring the site engineer’s strict implementation of the MS and Risk Assessment, the use of proper tools and equipment to maintain safety, certifications of equipment and their adherence to safety regulations, reporting of any unsafe work or stopping work that does not comply with ES&H procedures. Will advise on Health & Safety requirements and monitor the Hazard controls implemented on site as per the Method Statement/Risk assessment.
Surveyor
Carry out pre-construction survey to fix the locations and corresponding elevations as per the approved shop drawings. Ensure the quality and compliance during phases of surveying works and the regular checking of the surveying equipment or periodic calibration from the third party. Ensure validity and the serial number of calibration certificates is available and posted in the survey equipment. Ensure proper safety guarding of surveying equipment. To maintain the records of all surveying equipment handled.
Equipment Operator 
The only authorized person to operate any equipment to be used in the project.
Rigger 
The rigger assists in the movement of heavy equipment and loads to be lifted. A rigger setups machinery and secures it in place and signal or verbally direct workers engaged in hoisting and moving loads, in order to ensure the safety of workers and materials.
First Aider 
The first aider responds promptly when requested, operate with competence, know how to secure additional help when needed, reports incidents and actions taken and comply with requirements for certification.
Banksman 
The role of a banks-man is to provide additional eyes and ears to assist the operator of the equipment to navigate or operate safely.
Carpenter
A carpenter construct, erect, install and repair structures and fixtures of wood, plywood, and wallboards using carpenter’s hand tools and power tools.
Mason
A mason is a tradesman in building with units of various natural or artificial mineral products, as stones, bricks, cinder blocks, hollow blocks or tiles, usually with the use of mortar or cement as a bonding agent.
Helpers /Labors
Perform tasks involving physical labor at building, assists the skilled workers, remove trash, and residual building debris. Assist in constructing and later disassembling reinforcement braces, concrete forms, scaffolds and temporary structures.
5. Interfacing with Other Operations
Completion of RC column and wall concrete works with required embedment.
6. Duration, Phasing with the Subcontractors
Refer to approved baseline schedule for the duration of block works.
7. List of Subcontractors
Subcontractor ______ Name
II. Resources
1. Plant and Equipment

Transit Mixers and Accessories    1    Concreting lintel/lintel band
Concrete Pumps                                1     Concreting lintel/lintel band
Concrete Vibrators                           5     Concreting lintel/lintel band
Crane                                                     1    Lifting
Air Compressor                                  1    Cleaning
Portable batch mixer                        1    Mixing of mortar
Leica TS 15m Total Station              4    Setting Out for Construction
Leica NA2 Automatic Level             4    Levelling
Shoring/formwork material         1 lot  Support Lintel concrete
Trailer / Truck                                      1    Transportation
Bagger Mixer                                        1    Concrete / Mortar Mixing
Note:
All 3rd Party Certificates shall be inspected prior to commence work
2. Work Force
Designation                      No. of Persons
Site Engineer                       As per Site requirement
Land Surveyor                     As per Site requirement
Survey Aide                          As per Site requirement
Foreman                               As per Site requirement
Equipment/Machinery Operator   1 for each Equipment/Machinery
Banksman                           As per Site requirement
Steel Fixers                         As per Site requirement
Carpenter                            As per Site requirement
Masons                                 As per Site requirement
Helpers/Laborers              As per Site requirement
HSE Engineer                     As per Site requirement
First Aider                           As per Site requirement
3. Light Tools
Description                        No. of Units
Power Tools (Various)    As per Site requirement
Hand Tools (Various)     As per Site requirement
On Field testing and sampling
Equipment                        As per Site requirement
Bucket/pan and trowel to pour/place
Mortar                                 As per Site requirement
Manual mortar placing and
Shifting Bucket/pan and trowel to pour/place
Mortar                                 As per Site requirement
Manual mortar placing and
Shifting                              As per Site requirement
Wooden Float                   1 lot Application Equipment
Steel or Plastic finishing Float 1 lot Application Equipment
Plumbline or plumb      As per Site requirement
Cleaning Tools                  As per Site requirement
III. Materials
1. Aggregates
Should meet the requirement mentioned in Project Specifications.
2. Cement (OPC & SRC)
Should meet the requirement mentioned in Project Specifications.
3.Water
Should meet the requirement mentioned in Project Specifications.
4. Concrete Masonry Unit (CMU)
Above ground blocks shall be hollow CMU made with OPC and below ground shall be solid CMU made with SRC (Sulphate Resisting Cement).
CMU should meet requirements of BS EN 771-3 and BS 6073-2.
The use of blocks shall comply with below table:
Minimum Proportion of-

Class Compressive Strength (N/mm2) Uses for which blocks are suitable Class of mortar Mortar constituents (Kg) Compressive Strength at 28 days (N/mm2)
Avg of

10

Blocks

Lowest

Individual Block

Cement Sand
1 7.0 5.6 External non-load

bearing wall

M6 155 710 6
2 10.4 8.3 Load bearing wall M6 155 710 6
3 17.4 14 Load bearing

below ground wall

M12 190 675 12
4 14.0 11.2 Soakaways & Manholes M12 190 675 12
5 4 3.6 Internal non-load

bearing wall

M6 155 710 6
6 4 3.6 Roof Block M4 110 755 4
7 4 3.6 Protective skins to

foundations

M6 155 710 6

e.The volume of cavities shall not exceed 50% of the gross volume of the block. The block shall comply with below dimensions:

Coordinating (nominal) Size including the joints and tolerances (mm) Work (manufacture) Size (mm) Minimum Thickness (mm)
Wall Web
400 x 200 x 100 390 x 190 x 100 19 19
400 x 200 x 150 390 x 190 x 150 25 25
400 x 200 x 200 390 x 190 x 200 32 30

f. Blocks not exceeding 75 mm thickness shall be solid.
g. Fire rated concrete block of size 15 mm x 400 mm x 200 mm shall be fire resistant up to 120 min.
5. Wall ties and metal lath for block wall stiffeners
See TDS samples in pdf of commercially available wall ties and metal lath Wall Ties-block wall stiffeners for Blockworks and Expanded Mesh_Lath-block wall stiffeners for Blockworks
6. Glass Units
Shall incorporate expansion-contraction thermal foam tape, sealants, flashings and other items necessary for complete installation.
The contractor shall submit assembly instructions and installation drawings as required.
To indicate methods of construction, location, and spacing of anchorage, joinery, block wall stiffeners, finishes, sizes, shapes, the thickness of all materials and relationship to the adjoining work.
Gypsum Unit (Claustra walls)
a. Shall meet the criteria mentioned for CMU except where noted.
b. They may be of either:
White gypsum plaster
Concrete
White concrete
7. Approved Mortar mix
OPC C40 Concrete as min shall be used for fire-rated CMU wall
8. Approved concrete mix for lintel work
9. Approved Curing Compound
Refer to referenced Materials Submittals for approved material submittals.
Note: Test Certificates
1. The test certificates and sample results are provided in Appendix F, which shows the compliance of materials with the specifications.
The Material Safety Data Sheet is provided in Appendix F.
IV. Site Planning
1.Preparation
The Main contractor shall ensure that all gate passes, permits, tools, materials for safety precautions, manpower and equipment are available before commencement of work.The Site Team shall make sure that access roads are always clear from any obstruction and site is always accessible.
2.Site Clearance
Before commencing the work, the area shall be cleared of all debris, loose materials or other obstructions.Required levels are to be confirmed and verified by Site Engineer and QC Engineer before commencing the work.It is the responsibility of the CM to ensure that any preceding activity is completed.If the block work is required to be done on earlier concrete work, it is the responsibility of the QC Engineer to approve that concrete had hardened (%Strength) enough to withstand the load of manpower, formwork, scaffolding, blockworks material dead load and concerning operations.
3.Traffic Management
Other than some special cases no special traffic management plan is required.Special cases can be identified on individual bases and related actions can be taken accordingly.
4. Pre-construction Safety Meetings:
The meeting shall be scheduled prior to the beginning of the work and before any Subcontractor starts on the project.Safety awareness meetings will be conducted every working day morning/every other day to brief the workforce in the safety prevention measures. The equipment check for safety shall be recorded/ documented during the daily Safety Awareness Meeting.Working at height and fall protection will be discussed to emphasize these meetings.Each worker will be instructed to follow specific safety requirements related to his trade. They will be required to follow installed safety signs, observe barricades and use opens.Main Contractor Safety will perform hazard risk analysis by identifying all steps, hazards identified in those steps, with a focus on the relationship between the work task, the tools and the work environment. After identifying uncontrolled hazards; Main Contractor will take steps to eliminate or reduce them to an acceptable risk level.General contractual Safety, Health and Environmental requirements.Roles of the contractor, subcontractors, authority representatives and all project workers.
Accident reporting requirements.
Specific details of the work to be performed along with the use of personal protective equipment.
Emergency procedure.
5.Operating Procedures:
Site investigation has to be carried out to develop safety precautions and measures prior to the commencement of the work. After such investigation, relevant sign boards will be displayed and barricades will be installed where and as necessary, such as but not limited to the following: Advanced signs e.g. “Work Area” signs will be placed the activity zones or fall hazard zone on around the area. After completion of the work, safety cones and barricades have to be removed accordingly.
V.Methodology
1. General
The materials and mortar mix design must be approved and available at the site. Any change in source shall be reported to Engineer. Use approved material and store in a dry place, away from the ground, moisture, dirt, and other contaminants. The expired material shall be removed from the site. Masonry units shall be carefully unloaded and handled so as to prevent chipping and breakage.
Tipping of units is not allowed.
Stored units must be kept under waterproof covers.
Packaged materials shall be stored in their original containers referring to manufacturers guidelines.
Store cement and other cementitious materials away from moisture above the ground.
Setting out of work shall be done by the surveyor for any activity including formwork which confirms the shape, size, and level of block work.
This document applies to CMU block work, Glass wall, Gypsum (Claustra) wall and services through block work where concreting is required.
The Site Engineer and the QA/QC Engineer will be responsible for monitoring receipt of material and conduct the sampling and testing of related materials according to the Quality Plan on site.
If any field test indicates that the concrete may be deficient, the QC will report this to the concerned Laboratory and PM/CM, immediately. PM/CM will review the test results and will take the required action.
The Site Engineer and the QC will monitor the block work construction and will notify the Site Agent of any unacceptable materials or operations for action.
Approval of the Mockup Sample
Before any fair or plastered masonry work is commenced, the contractor is to erect one sample panel, size 1800 mm long x 2000 mm high, of each type of finish to be used and shall be retained on site for comparison. The panel should incorporate typical opening detail and typical corner detail, and a typical movement joint.
The quality of all subsequent blockworks shall match the approved mockup.
Preliminary
Before commencing masonry works, all relevant approved shop drawings shall be provided incorporating block wall partitioning, the sizes, and locations of architectural and electrical/ mechanical services openings.
2.Concrete Lintel
a.Constituents of mortar and concrete (for lintel work) shall meet the requirement of aggregate, cement and water.
b.The concreting operation for lintel work shall be carried out following the approved “Method Statement for concrete work” including activities like formwork, mixing, transportation placing and curing.
c.No concrete shall be site mixed.
d.Required arrangements (including concrete pump, scaffolding etc.) shall be made for concreting of partial lintel or lintel band all across the length of the wall.
e.All concreting operation shall be done in strict accordance with approved IFC drawings.
f.An open joint not less than 12 mm is to be left between the ends of lintels and the blocks adjacent to these ends.
g.If possible, these open joints shall be filled during plastering or other works required filling.
h.Partial Lintels are to have a minimum end bearing of 200 mm.
3. Mortar, Grout
a.The approved mortar mix related to work with an allowance of bulking of sand and having no plasticisers shall be used. The proportion of constituents shall match to Table below:

Nominal Mix by mass and their compressive strength
Class Cement (C), Lime (L) & Sand (S) with or without entrainment (kg) Cement (C) & Sand (S) with or without entrainment (kg) Compressive strength at 28 days N/ mm2
C L S C S
M2 70 50 740 85 775 2
M4 105 35 725 110 755 4
M6 135 25 700 155 710 6
M12 190 20 655 190 675 12

b.Mortar shall be made on site by either portable batch mixer using weigh batching or manual mix using volume batching. For larger quantities it can be mixed in batch plant.
c.Mortar which has begun to set or which has been site-mixed for a period of more than one hour in the cases of classes M2 and M6, and two hours in the case of classes M4 and M12 shall not be used.
d.Mortar for use in contact with the ground will be mixed using sulphate resistant cement.
4. Cement grout shall be mixed in the relevant proportions indicated in below table using the minimum quantity of water to ensure the necessary fluidity and to render it capable of penetrating the work.

Class Nominal Mix by Mass
Cement Sand PFA
G1 1 NA NA
G2 1 3 NA
G3 1 10 NA
G4 1 NA 10
G5 1 NA 4
G6 1 NA ½

5.Cement grout shall be used within one hour of mixing. Sulphate resisting cement shall not be used as a constituent of grouts containing Pulverized Fly Ash (PFA). Minimum compressive strength for grout shall be referring to approved design submittals.

4 Masonry Blockworks
4.1 General
a.Tops of the walls shall be covered with waterproof covering during discontinuation of work and while resuming work, loose mortar and foreign material shall be cleaned.
b.Newly laid block work and brickwork shall be protected from the harmful effects of sunshine, rain drying wind and surface water.
c.Immediately following setting, brush exposed surfaces free of mortar or other foreign matter.
d.In the special situation where units are to be removed may be broken and removed.
Mortar is to be carefully chiseled out and space should be cleaned. Before placing new units, surround units and area shall be water sprayed and allowed to surface dry. After buttering with mortar, new units can be placed.
e.Unless otherwise specified, all block faces are to provide a satisfactory bond for mortar, plastering or rendering.
4.2 Blockworks Laying
a.The average thickness of both vertical and horizontal mortar joints is to be 10mm exclusive of any key in the joint surface of the unit.
b.All blocks and previous day’s work shall be wetted before commencing/resuming new work.
c.Permissible deviations of block work shall be according to below table:

Item of Construction Type of Dimensions Permissible Deviations (mm)
Space between Walls At Floor 20
At Soffit 30
Size   and   Shape   of Elements wall Height up to 3m 40
Straightness is 5m 8
Verticality up to 2m 15
Level of bed joints in 3m 15
Walls Position in plan of any point or specified face in relation to nearest grid line on the same level 15
Doors,   window openings and other Position in elevation from design 15
Level of sill or soffit for each 1m of width 5
With maximum of 15
Verticality of any point for each 1m height 5
With maximum of 15

d.Any block which is moved/laid after the mortar has stiffened (not plastic) shall be removed and relaid with fresh mortar.
e.Blocks walls are to be built from undamaged blocks in stretcher bond unless otherwise specified. Half blocks and special blocks are to be used as required to ensure correct bonding.
f.The work is to be carried out course by course not leaving any part more than 800 mm lower than another.
g.Partitions shall be 10 mm thick unless otherwise noted. Partitions having lavatories or other plumbing fixtures secured to them back to back (or approximately so) are to be a minimum of 150 mm thick. Solid concrete masonry units shall be built in where full units cannot be used or where needed for the fixing of accessories. Bells or hubs of pipes must be completely enclosed.
h.When pipes or conduits or both occur in plastered partitions, at least one web of the hollow masonry units must be retained.
i.When new masonry partitions start on existing floors, the existing floor finish material is to be cut down to the concrete surface.
j.Any joint on the surface of the face of block wall shall be tooled after the mortar is thumbprint hard. Where cutting of blocks in fair face work is unavoidable, this should be done using a mechanical saw.
k.Openings are to be square and the jambs, vertical and formed with the uncut faces of the blocks. If the door and window frames are to be built-in the approved drawings are to be referred to fixing details. The jamb walling is to be built up against the frame all round as the work proceeds.
l.Walls and partitions are to be bonded or tied (ties=2×20 mm stainless ties on external side and galvanized steel on internal side as approved) referring to approved drawings.Ties shall be fully embedded in the vertical spacing not exceeding 600 mm. The ends of the ties are to project minimum 75 mm into each wall or partition.
m.All connections between block walls or partition and concrete or steel columns are to be reinforced at maximum 400 mm centers by galvanized metal or stiffeners for columns in block work except noted on approved drawings.
n.Metal ties are to be a width that will allow 20mm clearance from each face of the wall and to be embedded for a minimum distance of 200mm in the mortar joint unless noted in the approved drawing.
o.Internal walls shall be built-up to leave 20mm joint between the top of the wall grout or partition and the soffit of the slab. The joint should be filled by Class M6 mortar. Where concrete slabs are supported on block work. The top of block should be fully grouted or solid block shall be provided to void any mortar slip between ceiling and top of the wall.
p.In the following situations, the cavities of hollow block walls are to be filled solid with Class M6 mortar:

  • Jambs of all openings
  • Ends, angles and junctions of walls and partitions
  • Junctions of walls and partitions with the stiffeners for column in block work
  • At sills
  • At tops of partitions, if so specified
  • To provide a solid fixing for false ceiling perimeters.

q.The filling of courses is to be supported on a strip of expanded metal lathing embedded in the joint below.
r.Walls which are to be filled are to be built up in lifts not exceeding 1,200 mm and be filled after allowing a minimum period of 24 hours to elapse to enable the mortar to harden. The initial compaction of concrete is to be carried out using a 25 x 50 mm wooden rod or by vibrator. The final compaction shall take place 10-15 minutes after initial compaction.
s.Where walls are constructed of hollow blocks, the mechanical and electrical services are to be run in the cavities of blocks wherever possible as approved drawings.
t.All damp-proof courses are to be solidly bedded in the mortar. Joints shall be lapped a minimum of 10 mm at all passings and sealed.
u.All block work shall be kept covered with wet hessian cloth or other approved material for a minimum of 3 days.
v.The glass block grid system shall be assembled, sealed, screwed (using predrilled holes)following manufacturer’s instructions. Sealant shall be applied to completely fill the channel around each glass block. All label shall be removed from the glass blocks and cleaned.
w.Following points are to be for Gypsum units (Claustra Wall):
All blocks shall have 100 mm thickness unless otherwise noted with slots in the ends of blocks to receive reinforcement. Claustra walls should be built with vertical straight joints reinforced with 12 mm mild steel reinforcing bars vertically at each straight joint pinned to the structure at each end and surrounded solid with mortar.
Blocks are to be bedded in a mixture of white cement and sand (1:4) and struck pointed to approval.
x.Provide color and texture matching the range represented by the Engineer’s sample for the exposed face.
4.3 Joints
a. All joints/connections between masonry walls or partitions and concrete columns or walls shall be made using propriety GI ties secured to fixing channels or block wall stiffeners embedded in the concrete.
b.Movement joints to be 12 mm wide and formed where indicated or where continuous runs of block walling exceed 8 meters in length.
c.The joints are to be straight and vertically formed with uncut faces of blocks to each side and filled with an approved compressible material.
d.External joints are to be sealed with mastic compatible with the joint filling material when the block walling is thoroughly clean and dry.
e.Joints between firewall top surface and the underside of the overlying slab or desk shall be smoke-sealed with fire resisting compressible boards complying with the fire strategy partition fire rating requirements as per design.
f.Ducts, pipes, wires and conduits passing through firewalls shall be protected by filling the space between the penetrating item and the fire barrier with firestop compounds capable of maintaining the required fire resistance and resisting the passage of smoke.
g.Seal and filler shall be applied by certified applicator from the approved manufacturer.
4.4 Controlling/Reducing Temperature of Constituent Materials
a. Shading of aggregates in feed storage shall be implemented by the Concrete Supplier to ensure consistency of aggregates used for concrete in Hot Weather conditions.
b.Sprinkling the specified temperature of the fresh concrete cannot be achieved by normal method, the use of an alternative method such as use of liquid nitrogen should be assessed.
4.4.1 Water
The following measures shall be implemented by the concrete Supplier to ensure consistency of water used for concrete in hot weather conditions. Chilling of Water before use (temperature must not be less than 5 degrees) Use of flaked ice directly added to the concrete mixer to replace part of chilled water.
4.4.2 Cement
The following measures shall be implemented by the Concrete Supplier to ensure consistency of cement used for concrete in hot weather conditions. The use of freshly ground cement at very high temperature shall not be permitted;
The cement shall be kept below the temperature which there is tendency of false set;
Under no conditions shall the temperature of the cement exceed 68 degrees when it enters the mixture.
5. Sampling and Testing
a. Samples of each type of masonry unit to be used shall be submitted to Engineer for approval before use.
b.Initially, 12 units will be selected by the Engineer from the first batch of units delivered which shall later be given to the approved laboratory for testing.
The sample to be accompanied by the following written information: Type of unit

  • Means of identification of the unit
  • Name of the manufacturer
  • Type of masonry unit making machine
  • The capacity of the plant and present stocks available
  • Certificates stating that the units are suitable for intended use
  • Full Water Absorption: The average water absorption of the tested sample shall not exceed 5% and no individual block shall have water absorption greater than 5.5%.

c.Water absorption by capillarity method: The manufacturer shall declare in g/m2 the maximum water absorption coefficient due to capillarity action of the exposed face of the unit.
VI. Risk Assessment and Job Hazard Analysis
Please refer to the attached document in Appendix B.
VII. Permit and Licensing Requirements
Please refer to attached Permit to Work in Appendix C.
VIII. Drawings, Diagrams, and Maps
Please refer to the attached document in Appendix A.
IX. Pre-Start Safety Briefing Arrangements
Refer to Risk Assessment in Appendix B.
1.Protective and Safety Equipment
All workers Involved shall be equipped with adequate PPE as stated below:

  • Safety Helmet with Company Logo
  • Safety Boots
  • High Visibility Vest
  • Safety Goggles
  • Hand Gloves
  • Coveralls
  • Remove or take off immediately any clothing that becomes wet.Wash off the concrete with plenty of water and seek for First Aid Treatment, if necessary.

2.Information to Personnel

  • Safety Induction
  • Job training
  • Superintendents Notices/Memos
  • Toolbox talks
  • START Card
  • Site-specific Risk Assessment shall be briefed to all personnel prior the
    commencement of concrete works.

3.Special Safety Requirements:

  • The required TSTI (Total Safety Task Instruction) will be prepared prior to the commencement of work and positively implemented.
  • The required permit to work by consultant shall be obtained prior to the commencement of work
  • Generated dust (By end or equipment operations), shall be controlled by periodic water spraying
  • The equipment operators shall possess the required licenses and certificates
  • All necessary personal/protective equipment (PPE), as well as harness, be provided Banks man, wearing distinctive vests, shall be assigned to help operators maneuver their equipment.
  • The project safety officer is responsible along with the project zone site engineer for ensuring that all operations are carried out with due regard to the safety of all project personnel & property.
  • No working at height issues anticipated.
  • All working activity shall comply with Client Safety Procedure
  • First Aid Material
  • General management of protection/operation hazards are to be observed

4.Emergency Procedures
The Flowchart below shows the emergency contact no. during work:

X. Supervision and Monitoring Arrangements

Construction Manager

He is in charge of all construction activities. Schedule the project in logical steps and budget time required to meet deadlines. Inspect and review projects to monitor compliance with building and safety codes and other regulations.

Site Engineer

The Site Engineer shall evaluate the number of materials consumed by each trade to be compared against planned quantity

Site Foreman

A construction foreman is responsible for supervising the workers and also doing actual construction work. The foreman monitors employees to ensure that the work is done efficiently and within quality standards.

QA/QC Engineer

The QA/QC Engineer shall monitor whether the installation works is conforming to the required quality otherwise he shall notify the Site Engineer should he found non-conformance to the ongoing activities. The Site Engineer shall immediately rectify the work to avoid receipt of NCR from the QA/QC Engineer.

HSE Engineer

The Safety Engineer shall be full time at the site and shall frequently visit all the ongoing works at site. All safety violations and on-conformance of the HSE Plan shall be registered and immediate action shall be done in coordination with the Site Engineer.

Chief Surveyor

A Chief Surveyor ensures that surveying data are collected and recorded accurately and that all company procedures are followed by crew members.

XI. Environment and Quality Issues

  1. Precautionary Measure

All precautionary measures shall be briefed to all workers prior to commence activity

  1. Disposal Requirements

All waste shall be disposed of as per Environmental Compliance and Management Plan and as per Government approved disposal areas.

  1. Inspection, Test, and Sampling

Request for Inspection and Testing will be submitted prior and after execution of works.

Inspection and Test Plan (ITP) shall be provided.

All necessary testing & inspection shall be carried out as per (Inspection and Testing of Block Work and Concrete Works) Part of Project Quality Plan. This includes:

  1. Approved Method statements;
  2. Approved Shop drawing;
  3. Approved Inspection for formworks;
  4. Approved inspection of scaffolding if applicable;
  5. Approved inspection of Reinforcement;
  6. Approved pre-casting inspection;
  7. Approved third-party laboratory;
  8. Approved mix design;
  9. Approved materials
  10. Quality Assurance Requirements Table
  11. Refer to Project Quality Plan
  12. Inspection and Test Plan (ITP) – Appendix – D.

XII. Attachments

  1. Risk Assessment

Refer to Risk Assessment on Appendix – B.

  1. Reference Documentation
  2. Project Specifications
  3. Applicable Codes and Standards
  4. List of Appendices

APPENDIX A: Drawings, Diagrams, and Maps
Site Layout, Maps, Locations, etc. to be attached here.

 APPENDIX B: Risk Assessment and Job Hazard Analysis

Risk Assessment Table to be attached here. (As your support- Just Complete the Survey to Download the file)
Download the Risk Assessment Form Here

 APPENDIX C: Permit & Licensing Requirements Permit to Work

Permit to Work Form to be attached here.

 APPENDIX D: Inspection & Testing Plan (ITP)

Inspection and Test Plan to be attached here. (As your support-Just Complete the Survey to Download the file)
Download the Inspection and Test Plan Blockworks Here

 APPENDIX E: QC Formats

Relevant QC Format Checklists to be attached here.

Survey Layout Checklist (Coordinate and Level Verifications)

Blockworks Checklist

 APPENDIX F: Material Safety Data Sheet & Test Certificates of Materials

Material Safety Data Sheet & Test Certificates of Materials Used in the Method Statement to be attached here.

 APPENDIX G: Approved Material Submittals

Approval of Material Submittals in the Project to be attached here.

 

Version 2.0
Method Statement for Block works

Block works activity at site

CONTENTS
1. SCOPE
2. REFERENCES
3. RESPONSIBILITIES
4. MATERIALS
5. PROCEDURE
6. QUALITY ASSURANCE I QUALITY CONTROL
7. SAFETY RISK ASSESSMENT
8. INSPECTION AND TEST PLAN
9. ANNEXURES

1. SCOPE
This Method Statement provides the control sequence of construction and methodology that will be used for block works activity in order to achieve compliance with the contract specifications and drawings for the project xxxxxxxxxxxxxx.
2. REFERENCES
See annexures
2.1. PROJECT SPECIFICATIONS
See annexures
2.2. PROJECT DRAWINGS
See annexures for approved drawings and details
3. RESPONSIBILITIES
3.1. The Project Manager and Construction Manager shall be responsible for the overall implementation of the construction procedures. Responsible for the implementation of method statement and ensure that his team of engineers and foremen are aware of this.
3.2. The Engineer-in-charge shall be responsible for the works execution.
3.3. Construction Engineer shall inform all parties concerned for any kind of inspection and time schedule. Engineer shall be responsible for the efficient use of all resources to execute the work in accordance with the construction drawings.
3.4. Land surveyor shall do marking, setting out and all survey works at site.
3.5. The QA/QC shall be responsible for conducting surveillance and inspection in accordance with the specification. He shall review relevant document material certificates and non-conformance report; receive internal request of inspection from Construction Engineer/s and prepare request for inspection as per schedule required.
3.6. The Safety Officer shall provide safety precautions such as warning tapes, signs to be positioned as deemed necessary. Provide all necessary PPE, use right tools and equipment for the jobs. Comply with all safety rules and safety signage’s instructions. All relevant permissions are available for the works.
4. MATERIALS
All materials shall be as per approved materials noted by the consultant. See annexures for the attached approved material submittals.
4.1. Concrete Blocks
4.2. Portland Cement
4.3. Sand (Aggregate)
4.4. Masonry accessories
5. PROCEDURE (WORK METHODOLOGY)
5.1. Concrete blocks will be laid in accordance with the Project Specifications.
1. All 100 mm thick masonry work will be built with solid blocks.
2. 150 mm and 200 mm thick internal masonry works will be built with hollow blocks.
3. Single layer 200 mm thick block works in external walls of the proposed buildings shall be built in insulated blocks.
4. Clean all area for any material or concrete debris obstructing laying out.
5.2. The hollow blocks and Solid blocks to be used will have a minimum compressive strength at 28th days of 7.0 N/mm2 and 15.0 N/mm2 as specified in Project Specifications. Provide setting-out/survey report to be submitted to consultant prior to proceed with the block laying.
5.3. Block wall layout will be marked on the casted slab as shown on the Architectural drawings. Reference drawings shall be provided (key plan, detail and related approved drawings shall be kept at the site locations for reference).
5.4. Blocks will be laid out in advance for accurate spacing of stretcher pattern with uniform joint widths (1 0 mm) and the possible requirement of stiffener column and bond beam as per shop drawing.
5.5. Starter blocks will be laid on full mortar bedding on casted slab.
5.6. The succeeding courses will be laid in full mortar coverage on horizontal and vertical face shells.
5. 7. Blocks will be laid in running (stretcher) bond pattern with vertical joint in each course centred on units in courses above and below.
5.8. Corners will be bonded and interlocked at each course of each leaf.
5.9. Wherever inevitable to lay cut piece, concrete blocks will be cut using motor driven saw. Cut piece less than 100 mm will be avoided at corners and jambs locations. No damaged block works will be used.
5.1 0. Each block is to be adjusted to its final position in the wall whilst mortar is still plastic. Any block which is moved after the mortar has been stiffened shall be removed and re-laid with fresh mortar. Grout and mortar shall be prepared in a manner that will satisfy the specifications.
5.11. Joints on the wall’s face will be left to stiffen slightly (thumbprint hard) and then be firmly compacted with a jointing tool and struck off flushed to the wall line.
5.12. Wherever required, the frequency and details of bond beams and stiffener columns will be as shown on the approved block works connection
5.13. Ties for bonding concrete blocks walls and concrete columns to be galvanized steel 3 mm thick and 30 mm wide, L – shaped with minimum 150 mm leg for embedment in mortar joints and 50 mm short leg with pre-drilled hole for fixing to concrete column with post-installed cartridge-powered corrosion-resistant anchors of matching diameter and sufficient length. One row of ties to be installed for each end of wall spaced at each second course of blocks.
5.14. Expanded mesh lath reinforcement to be galvanized, the width of expanded mesh will allow at least 20 mm clearances from each face of wall, Block Thickness Reinforcement Width (mm)

Block Thickness (mm)

Reinforcement Width (mm)

100

50
150

60

200

110

5.15. Vertical bar to be inserted in the concrete top of the slab, minimum diameter 12 mm, the distance between vertical bars not more than 80 bar diameter, the distance between block edge and vertical bars 12 mm.
5.16. Use mechanical/chemical anchors and methods recommended by the block manufacturer for the service pipe fixation and other fixings on the masonry wall.
5.17. Horizontal, vertical stiffeners and opening reinforcements will be as per approved drawing. Check for any openings such as doors or windows opening shall be at the right locations.
5.18. When resuming work, exposed surfaces of set masonry will be cleaned and loosed masonry unit and mortar will be removed prior laying of fresh masonry.
5.19. Anchor masonry to structural member will follow as per Project Specifications.
5.20. Movement joints to be 12 mm wide and formed where indicated or where continuous runs of block walling exceed 8 metres in length.
5.21. Cement, sand mortar will be used, mortar class M 6 (155 kg Cement, 710 kg Sand) will be used.
5.22. Metal, precast or cast in-situ lintels will be used at site; lintels are to be having a minimum end bearing of 200 mm.
5.23. The constructed masonry wall will be cured by keeping wet for at least 3 days.
6. QUALITY ASSURANCE/ QUALITY CONTROL
6.1. Concrete blocks samples to be tested as per Project Specification or :
Compressive strength, Density of units and Dimension of units will be for each type 1 test (5 samples) per batch/lot, 5000 units or 1000 m².
6.2. Significant Stages of Work shall be ensured by Project Engineer/ Site Engineer/ Quality Control Engineer in compliance with the specified requirements of the contract documents including:
6.2.1. Use of approved drawings and approved materials.
6.2.2. Mockup to be approved before commencing the work.
6.2.3. The layout of the work before commencing installation shall be done. Setting out from surveyor.
6.2.4. Cleaning out debris and dust.
6.2.5. Setting out of block work
6.2.6. Laying of starter blocks
6.2.7. Laying of succeeding courses
6.2.8. Provision of stiffener columns and bond beams wherever required.
6.3. QC Engineers shall monitor all these stages and Inspection Request (IR) shall be submitted to Consultant after laying of starter blocks prior continuing subsequent courses.
7. SAFETY RISK ASSESSMENT
Hazards and risk assessment are carried out and are reviewed by the HSE Officer to ensure that all the hazards have been identified and adequate control measures are in place. Provide enough lighting to proceed the works at site.
7.1. All personnel shall wear the appropriate personal protective equipment, designated by their foreman, or as good safety practice.
7.2. All accidents/incidents, injuries, and/or property damage, no matter how slight, must be reported immediately.
7 .3. Report any unsafe condition and/or practice to your foreman or safety representative.
7 .4. All tools and equipment for the task shall be in a safe condition and fit for its purpose.
7 .5. It is the responsibility of each subcontractor to assure that employees are protected from all energy sources. An energy lockout program must be coordinated in advance with the Engineering Project Manager.
8. INSPECTION AND TEST PLAN
See attached
9. ANNEXURES
See attached

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8 thoughts on “Method Statement for Blockworks/Masonry

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  3. Thank you so much for such a wonderful blog on QA/QC.
    Please update this blog on a regular basis so that we can learn more from this.
    It would be highly appreciated if you will send some original formats of PTS, NCR, IRP, IR,PQP, Checklists, Method Statements so that I can work as a QA/QC in some company. Thank you.

    Like

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