control of formwork

Al Rajhi Projects and Construction LLC

WORK PROCEDUREPROJECT: PROJECT NAMERef No. CONC/01

PAGE 1 OF 3

SECTION:CONCRETINGDATE OF ISSUE:Dec. 2012

SUBJECT:

BY:QA/QC ENGINEER

CONTROL OF FORMWORK

APPROVED BY:QEHS MANAGER

ACTIONVERIFY

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

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

.2After 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.

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

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

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

.6Ensure 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.

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

ProjectEngineer

ProjectEngineer

Project Director/Manager/Resources ManagerGeneralForeman

Gen.Foreman

Gen. Foreman/Designer

Gen.Foreman

ContractSpecs.

Shop Drawings

Formwork Shop drawings


PAGE 2 OF 3

SECTION: CONCRETINGDATE OF ISSUE:Dec. 2012

SUBJECT:

BY:QA/QC ENGINEER

CONTROL OF FORMWORKAPPROVED BY:QEHS MANAGER

ACTIONVERIFY

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

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

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

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

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

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

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

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

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

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

.19New 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.

.20A 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.Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman

CONC/04/A

CONC/04/A

CONC/04/A


PAGE 3 OF 3

SECTION:CONCRETINGDATE OF ISSUE:Dec. 2012

SUBJECT:

BY:QA/QC ENGINEER

CONTROL OF FORMWORK

APPROVED BY:QEHS MANAGER

ACTIONVERIFY

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

.22Striking 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.

.23Safety 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.

Gen.Foreman

QA/QC

Gen.ForemanGen.ForemanGen.Foreman

Gen Foreman

Gen. Foreman

Gen.Foreman

Gen.Foreman

Gen.Foreman/Safety Officer

Check sheet

ProjectSafety Plan

control of formwork

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