Method Statement for Casting of Blinding Concrete for Building Structures
TABLE OF CONTENTS
- Purpose
- Scope of Work
- Definitions
- References
- Materials
- Tools, Plant & Equipment
- Safety
- Prior Activities
- Procedure
- Responsibilities
- Attachments
1. Purpose
1.1 To ensure that the blinding for foundation are executed safely and in accordance with the contract requirements and that all quality assurance/ control activities are conducted in a systematic manner, works are inspected and conformance is verified and documented.
2. Scope of Work
2.1 This procedure is applicable to the following works associated with the Project titled,
New 2K Runway – Main Runway Works – contract number NRTW-1008-CN
2.2 This method statement outlines the procedures to be followed in casting of blinding for
building structure foundation at the locations shown on Contract drawings and as directed by the Engineer.
3. Definitions
3.1 CM Construction Manager
3.2 SE Site Engineer
3.3 CS Chief Surveyor
3.4 ME Material Engineer
3.5 ESHO Environmental, Safety, and Health Officer
3.6 ITP Inspection Testing Plan
3.7 AHA Activity Hazard Analysis
3.8 JHA Job Hazard Analysis
4. References
4.1 Specifications : Section 401
4.2 Drawings : Vol. 2 – Section 8 – Part D – Architectural and Structural.
4.3 BOQ : Bill No. 12, 13, 14, 15, 16, & 17.
5. Material
5.1 Concrete grade 30/20/S
5.2 Formwork (Timber and Aluminium beams)
5.3 Polythene sheet 1000 gauge
6. Tools , Plant & Equipments
6.1 Spirit level
6.2 Measuring tape
6.3 Hammer
6.4 Hand planer
6.5 Carpenter chisel
6.6 Plastic trowel
6.7 Steel trowel
6.8 Broom
6.9 Rain Boot
6.10 Wire Nails
6.11 Generator
6.12 Air compressor
6.13 Electric saw
6.14 Concrete vibrator
6.15 Personal Protective Equipment (PPE)
6.16 Concrete Pump
6.17 Power Floater
7. Safety
7.1 Prior to the commencement of any activities, the workforce will receive an induction talk on the project site safety requirements. This induction talk will include both activity safety issues, as well as general safety requirements.
7.2 The necessary safety measures will be taken to prevent accident or injury at all times. This may include barriers, warning tape/net, signage, watchman, flashing and rotating lights at night.
7.3 Where work upon existing services may be required, the necessary work permits and safety equipment should be obtained prior to the activity commencement.
7.4 Front line supervisor will ensure that Personal Protective Equipment is worn by site personnel at all times during construction activities.
7.5 Heat stress training will be provided.
7.6 Provisions of adequate cool drinking water, shade, and salt tablets will be in place.
7.7 Plant & Equipment will be provided with back-up alarms, lights, and all other applicable safety devices.
7.8 For AOA work, safety requirements as defined in Project Specification, Section 107, will be implemented. Specific safety training will be provided to personnel for AOA work.
8. Prior Activities
8.1 Foundation shop drawings to be approved by the Engineer.
8.2 Excavation and foundation preparation will be carried out as per submitted method statement
1008-OAJ-MS-1036 and the final approval of the Engineer .
9. Procedure
9.1 Casting of Blinding
9.1.1 Once the foundation level is approved by the Engineer, the CS shall mark the setting out and fix reference levels for blinding concrete.
9.1.2 The formwork (around 100mm height) shall be fixed and inspected by the Engineer’s Inspector.
9.1.3 Polythene sheet 1000 Gauge shall be laid and 75mm thick concrete grade 30/20/S shall be
poured, vibrated , leveled to the approved levels.
9.1.4 Special care should be taken to produce smooth and correct final level.
9.1.5 The concrete shall be protected by polythene sheet after finishing and wet hessian covered with
polythene sheet after final set.
9.1.6 Concrete surface shall be kept continuously and thoroughly wet for a curing period of 7 days.
10. Responsibilities
- The CM will coordinate with SE to ensure that the necessary resources to implement the approved Method Statement, JHA and AHA have been allocated to the task.
- The SE will ensure that the site preparation activities are conducted according to the approved Method Statement, JHA and AHA. The SE will also ensure that all in-situ tests, as required by the ITP are implemented.
- The ME will ensure that the materials being used are in accordance with the project specifications and approved material submittals.
- It is the site supervisor’s responsibility to organize the work in a safe manner to ensure that safety and protective equipment are being properly utilized. He must also ensure that the AHA and JHA are implemented and the approved Method Statement procedure is followed and the ITP is applied.