Underground Sewerage and Surface Water Drainage Method Statement

1. SCOPE

 This procedure covers controls to be carried out during construction of underground sewerage and surface water drainage works.

 

2. PROCEDURE

.1All sewerage and surface water drainage works will be carried out in accordance with the contract specification and good practice.

Where specifications are not provided or are incomplete, the matter shall be referred back to the Consultant for additional information.

.2 Depending upon the complexity of the work, and the requirements of the PQP, a method statement shall be prepared and approved by the Consultant which shall include:

i)    Proposed plant and equipment.

ii)    Jointing technique.

iii)    Trench support (in case of deep excavation).

iv)    Manufacturer’s jointing and installation details and test certificates (where relevant).

v)    Sequence of activities.

vi)    Compaction method and quality of fill material.

vii)    Test plan.

.3 Check delivery order and certificates against the specification and examine marks, labels and condition of material and components.

.4 Unload and handle materials and components with care to minimise damage and soiling.

 .5 Before commencing excavation, fence or board the area of work so as to prevent unauthorised access. Provide adequate safeguards, e.g. gangways, handrails, notices or direction boards and lighting at night.

.6 Contact local authority departments to obtain details of existing underground services. Proper marking will be employed on the site to avoid damage to any adjacent services.

.7 Provide adequate trench support to retain the sides of excavations and ensure the safe and proper construction of works and completion of backfilling.

.8 Spoil heaps stacked material and vehicles to be kept at a distance of more than the trench depth from the trench.

.9 Temporary supports to excavations will be maintained in position until sufficient backfill has been placed and compacted to ensure the stability of the sides of the excavation.

.10 Employ the proper jointing method as recommended by pipe manufacturer. Ensure that jointing faces are dry, clean and free from soil or bedding particles.

.11 Finalise an intermediate test plan and water testing to be done to check water tightness of pipeline.

3. DOCUMENTATION

.1 Appendix FOUN/06A and Appendix FOUN/06/B, shall be used to monitor drainage construction. Approval to proceed will be given by the QA/QC.

 

 

 

QA/QC – Quality Assurance/Quality Control, PE – Project Engineer, SE – Site Engineer,

SU – Surveyor, MEP – MEP Coordinator, GF – General Foreman

PROJECT: PROJECT NAME                        SITE NO.:
CHECK SHEET FOR SEWERAGE AND SURFACE WATER DRAINAGE			Sheet No.
SUBCONTRACTOR:CLIENT SECTION OF WORK ____________________________ LOCATION _________________
STAGE	ITEM	Checked by		DATE
PIPEWORK OR CHANNEL	1. Set line and level.	SU
	2. Check location of underground services before commencement of excavation.	SE
	3. Checkinverts levels and gradients.	SU
	4. Check correct diameter and material. Also check the compatibility of pipes, fittings and accessories for jointing e.g. ring seals, solvent cements, lubricants.	SE
	5. Check position and no. of connections.	SE
	6. Check availability of trench support material.	GF
	7. Check bedding and granular surround.	GF
	8. Backfill to specification material/compaction.	SE
	9. Ensure protection of laid pipeline from damage byconstruction traffic.	SE
	10. Pipe run rodded and tested.	PE/MEP
	APPROVAL TO PROCEED	QA/QC
GULLEY CONNECTION	1. Check correct gulley used.	SE
	2. Check position and level of gulley.	SE/SU
	3. Check correct surround.	GF
	4. Check gulley grid.	GF
	5. Check gulley cleaned out.	GF
	APPROVAL TO PROCEED	QA/QC

 

QA/QC – Quality Assurance/Quality Control, SE – Site Engineer, SU, – Surveyor, GF – General Foreman

 

Download Underground Sewerage and Surface Water Drainage Method Statement in word format: CONTROL OF SEWERAGE AND SURFACE WATER DRAINAGE

Underground Sewerage and Surface Water Drainage Method Statement

PROJECT: PROJECT NAME                        SITE NO.:
CHECK SHEET FOR SEWERAGE AND SURFACE WATER MANHOLES			Sheet No.
SECTION OF WORK: ____________________________MANHOLE No: ______________
STAGE	ITEM	Checked by		DATE
PREPARATION	1. Set position of manhole and base level.	SE/SU
	2. Check base concrete.	GF
	3. Check correct base rings (outlets).	SE
	4. Check rings/reducer/step irons.	SE
	5. Checks cover slab level and location of opening.	SE
	6. Check concrete surround.	GF
	7. Check correct cover/brick bedding/concrete haunch.	GF
	8. Check manhole benching.	GF
	9. Clean out manhole.	GF
	APPROVAL TO PROCEED	QA/QC

Glass Blockwork Method Statement

Preparation of Work, Materials and Components:

i) When the materials and components are distributed to the work area, ensure that the structure is not overloaded.

ii) Plan for scaffolding material required for work at heights. Plan for additional manpower for lifting blocks at heights.

iii) Set out anticipating the position of openings etc. in the work above to avoid adjustment of units leading to incorrect or uneven bonding.

Preparation of Mortar Mixes:

i) Mortar shall be mixed by machine except for small quantities only. Hand mixing (if permitted) may be done on a watertight platform.

ii) When mixed at site, batch boxes shall be used to ensure correct and consistent mix proportions.

iii) Use mortars (other than retarded mortars) within 2 hours of mixing or as specified.

Building walls:

i) Build work within permissible deviations as specified.

ii) Unless otherwise specified/permitted, lay blocks on a full bed of mortar and fill all joints. Place reinforcement as detailed in position, use spaces as necessary to keep courses levelled and perpend vertically aligned. Plumb quoins and all faces as the work proceeds. It is preferable to align vertically every fifth or sixth perpend and `even out’ the size of intermediate joints. Try to keep horizontal joints of uniform thickness.

iii) Do not carry one course more than the height specified in the contract specifications.

iv) Where pointing is specified rake out joints as work proceeds. The mortar used for the pointing should be mixed as detailed in the specification.

v) All work shall be bonded to adjacent structures by means of stainless steel cramps at specified spacing unless specified otherwise.

vi) All glass blocks must be cleaned down as work proceeds.

 

 

Download Glass Blockwork Method Statement in word format:CONTROL OF GLASS BLOCKWORK

Glass Blockwork Method Statement

Formwork Method Statement

1.    SCOPE

This procedure applies to the installation of formwork and the controls required during assembly, erection and final positioning of formwork used in Structural concrete operations.

2.    PROCEDURE

.1    All formwork activities will be carried out in accordance with the specification.

.2    After studying the structural drawings, the Project Engineer will plan for sizes, numbers and type of formwork to be used in consultation with the Structural Engineer, if required. Depending upon the programme, the number of repetitions will be decided.

External designers may be used for specific systems.

.3    Availability of formwork will be checked with the Procurement Manager and decision will be taken to buy, hire or reuse formwork material.

.4    During fabrication of formwork shutters, all dimensions shall be cross-checked with a view to avoiding corrective action during erection.

.5    Paint reference numbers on all panels to ensure their use in correct positions.

.6    Ensure that the props, shores, waling, bearers, clamps and tie rods are the right size and at the correct spacings. The Formwork designer shall check the falsework system with respect to load imposed on it and design parameters as laid down in the specification.

.7    Check that the falsework is securely braced and is on a firm foundation.

.8    Forms fastened to previously cast concrete must be tightly fixed to prevent grout loss. Cellular foam plastic strips can be used to make a seal.

.9    Check quality of shutter lining, tightness of bolts and wedges, built-in items, inserts and other embedments.

.10    Tie – rod holes to be made in the formwork shall be neat so that they can be patched or plugged later on.

.12    Particular attention will be paid to the rigidity and line of stop ends and joint formers.

.13    Remove all tie-wire clippings and nails, which may stain both the formwork and the concrete.

.14    Ensure that adequate access and working platforms are in place for the concreting gang and that toe boards and guardrails are provided.

.15    A spreader or lifting beam shall be used to prevent distortion when placing formwork.

.16    Adjustable steel props shall be erected in plumb and verticality of props checked using a spirit level.

.17    A prop should not be used if it is bent, creased or, rusted or has a bent head or base plate, damaged pin etc.

.18    Proper release of agent shall be used so that it can be removed without damaging the surface finish of the concrete.

.19    New timber and plywood forms shall be given first coat of the appropriate release agent 36 hours in advance, then a second coat just before they are used. Avoid excessive use of release agent as this can cause staining or retardation of the concrete.

.20    A close watch should be kept on all wedges and fastenings. Make sure that they do not work loose. Grout loss is an indication that some movement has occurred.

.21    When unsleeved tie bars are being used, ease them slightly before the concrete sets, and remove them as soon as it is safe.

.22    Striking the Formwork:

i)    Always obtain approval before striking the formwork in the form of Appendix CONC/04/A.

ii)    Ensure adequate safety measures while striking formwork.

iii)    Cleaning the face of forms shall start as soon as they have been struck.

iv)    Good storage is essential to ensure that formwork can be used again.

v)    Paint code numbers on them so that they can be readily identified when next needed.

.23    Safety During Formwork Operations:

i)    The weights of large prefabricated sections of formwork should be marked on them so that the lifting capacity of the crane at the working radius is not exceeded. Lifting points are usually provided.

ii)    If necessary, a spreader or lifting beam shall be used to prevent distortion.

iii)    Where lifting is done by the vertical soldiers, check that they are adequately connected to the walings.

iv)    Fire extinguishers in working order shall be in close proximity to the stored formwork.

Download
Formwork Method Statement in word format: CONTROL OF FORMWORK

Formwork Method Statement

Block work Method Statement

1.    SCOPE

This procedure provides a method of control for construction of block masonry work in order to achieve compliance with the contract specifications and drawings.

2.    PROCEDURE

.1    All precast concrete masonry blockwork will be carried out in accordance with the specification and Project Quality Plan.

In any circumstances where specifications are not provided or they are in any way incomplete, the matter shall be referred back to Consultant’s representative for additional information.

.2    Checks Prior to Start of blockwork:

i)    Ensure that the area to receive the blockwork is as per the contract drawings and approved finishing schedule.

ii)    Check if preceding activities have been inspected and approved.

iii)    Ensure that blocks are procured from approved manufacturer (s). Except where otherwise approved in writing each material shall be obtained from a single source.

iv)    Source certificates shall be obtained for all raw materials e.g. sand, cement and blocks to show compliance with the contract specification.

.3    Handling and Storage of Materials:

i)    Blocks shall be delivered to site palletised, off loaded as near to the point of use as practicable on a clean hard surface free from contamination by mud or surface water.

ii)    Cement shall be stored off the ground, kept dry and used in order of delivery.

iii)    Store metal ties and straps under cover and protect them from damage and distortion.

.4    Preparation of Work, Materials and Components:

i)    When the materials and components are distributed to the work area, ensure that the structure is not overloaded.

ii)    Plan for scaffolding material required for block work at heights. Plan for additional manpower for lifting blocks at heights.

iii)    Set out anticipating the position of openings etc. in the work above to avoid unnecessary cutting and adjustment of masonry units leading to incorrect or uneven bonding.

.5    Preparation of Mortar Mixes:

i)    Mortar shall be mixed by machine except for small quantities only (not containing plasticiser). Hand mixing (if permitted) may be done on a watertight platform.

ii)    When mixed at site, batch boxes shall be used to ensure correct and consistent mix proportions.

iii)    Use mortars (other than retarded mortars) within 2 hours of mixing or as specified.

.6    Building Blocks Walls:

i)    Build block work within permissible deviations as specified.

ii)    Unless otherwise specified/permitted, lay blocks on a full bed of mortar and fill all joints. Keep courses levelled and perpend vertically aligned. Plumb quoins and all faces as the work proceeds. It is preferable to Align vertically every fifth or sixth perpend and `even out’ the size of Intermediate joints. Try to keep horizontal joints of uniform thickness.

iii)    Do not carry one course more than the height specified in the contract specifications.

iv)    Rake out joints as work proceeds, on all faces to be plastered or rendered. This will provide a good key for the coating.

v)    If pointing is specified, the mortar used for the pointing should not be stronger than that used when constructing the wall unless specified otherwise.

vi)    All blockwork shall be bonded to adjacent reinforced concrete structures by means of galvanised mild steel cramps at specified spacing unless specified otherwise.

vii)    Partitions shall be bonded to main walls by toothing as specified in the contract.

.7    Chases and Holes:

    Cut chases and holes neatly and without damaging the walls as per the following unless specified otherwise:

i)    Chases in blockwork to be less than 75mm.

ii)    For hollow units maintain a minimum of 15mm thickness between bottom of chase and void.

iii)    Do not cut horizontal or raking chases to a depth exceeding one-third the thickness of the single leaf in walls or leaves contracted of solid units.

iv)    Holes shall not exceed 300mm x 300mm unless specified otherwise.

v)    Do not cut chases back-to-back exceeding the dimensional restrictions in (i),(ii) and (iii). Offset such chases in line by a distance at least equal to the wall thickness.

vi)    It is preferable to use mechanical rotary cutters, particularly when it is necessary to avoid heavy impact and vibration. The number and position of chases shall be strictly in accordance with the specification since unauthorised chasing might adversely affect one or more of the functional requirements of the walls e.g. its loadbearing capacity.

.8    Appendix FINI/01/B shall be used to record deliveries of blocks if required by the specification.

 

PROJECT: PROJECT NAME                            SITE NO.:

CHECK SHEET FOR CONTROL OF BLOCKWORK

Sheet No.

SUBCONTRACTOR: CLIENT

SECTION OF WORK ____________________________ LOCATION _________________

STAGE

ITEM

Checked

by

 

DATE

PRIOR TO BLOCK- WORK

 

1. Setting out (openings etc.)

SE/SU  2. Check source certificates of blocks, sand and

cement.

PE

3. Check mix proportion of mortar.

GF CHECKS DURING BLOCKWORK

4. Check alignment/width of perpends.

GF

5. Check line and level of courses.

GF

6. Check metal ties.

GF

7. Check raked out joints.

GF  8. Check toothing at joint of main wall with

partitions.

GF

9. Check compliance of chases with specifications.

GF  
   
   
   
   
   
   APPROVAL TO PROCEED WITH THE NEXT TRADE

QA/QC

QA/QC – Quality Assurance/Quality Control, PE – Project Engineer, SE – Site Engineer,

SU – Surveyor, GF – General Foreman

 

 

SITE REGISTER (BLOCK)

 

PROJECT NAME: _________________________BUILDING PERMIT NO. _____________

 

AREA: ____________    PLOT NO.: _______________________BLOCK REQUIRED: _______________ SIZE: ______________

CONTRACTOR: ________________________CONSULTANT: __________________________________________

 

 

Download Block work Method Statement in word format: CONTROL OF BLOCKWORK

Block work Method Statement

NO.	DATE OF PRODUCTION	LOT SIZE	FACTORY NAME	LOT NO.	C.O.C. NO.	INVOICE NO.	CONSULTANT’S SIGNATURE	INSPECTOR’S SIGNATURE	REMARKS