METHOD STATEMENT FOR INSTALLATION OF ROOF DRAINS, FUNNEL FLOOR DRAINS & FLOWER BED DRAINS

CONTENTS

1.0 PURPOSE
2.0 SCOPE
3.0 REFERENCES
4.0 DEFINITIONS
5.0 RESPONSIBILITIES
6.0 EQUIPMENTS
7.0 PROCEDURE
8.0 ATTACHMENTS

1.0 PURPOSE

This method statement is applicable for Installation of Roof Drains, Funnel Floor Drains & Flower Bed Drains for the project as mentioned in the Approved Shop Drawings for Drainage System.

2.0 SCOPE

Supply & Installation of Roof Drains, Funnel Floor Drains & Flower Bed Drains in line with project requirements as indicated in the Approved Shop Drawings for Drainage System.

3.0 REFERENCE

3.1 Latest Approved shop drawings for the required and applicable areas for Drainage.

3.2 Specifications

Project Quality Plan
- Material Approval for Roof Drain, Funnel Floor Drain & Flower Bed Drain

4.0 DEFINITIONS

Main Contractor :
MEP Contractor :
PQP : Project Quality Plan
PSP : Project Safety Plan
QCP : Quality Control Procedure
HSE : Health, Safety and Environment
MS : Method Statement
ITP : Inspection Test Plan
QA/QC : Quality Assurance / Quality Control Engineer.
ITR : Inspection and Test Request
MVR : Material Verification Request
MAR : Material Approval Request
UPVC Class E : Ultra polyvinyl chloride
UPVC : Ultra polyvinyl chloride
HDPE : High density polyethylene

5.0 RESPONSIBILITIES:

5.1 Project Manager

5.2 Construction Manager

5.3 Site Engineer

5.4 QA/QC Engineer (MEP):

5.6 Safety Officer

5.7 Store Keeper (SK)

6.0 EQUIPMENTS

Following tools shall be arranged before starting the job.

7.0 PROCEDURE

Ø Work Sequence/Procedure

General Requirements
All the materials received at site shall be as per the approved technical material submittal Roof Drains, Funnel Floor Drain & Flower Bed Drain & to be inspected upon receipt & approved by the engineer prior in proceeding with the installation through MVR. Any discrepancies, damages etc, should be reported to the supplier for rectification or replacement & to be removed from site immediately.
All construction/inspection/testing works shall be carried out in accordance with specifications & to be done by qualified Mechanical Engineers and shall be checked and approved by MEP Subcontractor Construction Manager along with QA/QC Engineer.
Contractor has to clarify the procedure for material delivery to the site through consultant Engineer at site.

7.2 Handling

7.2.1 Material Transport/ Delivery

During transportation ensure that the materials are in a box or at least covered with plastic. Do not drop the materials especially on hard surfaces. This is particularly important as the materials might be broken or some paint damages will occur.
Where ever possible the loading and offloading of the drains shall be carried out by hand.
When required or necessary, forklift shall be used in unloading the materials.

7.3 Storage

7.3.1 Storage on site

Drain Materials should be stored on a flat dry level surface free from liquids & pointed or sharp objects likely to cause rusting & scratches. Timber supports is much likely recommended used to support the materials or shall be stored on a higher elevation.
Materials which are outside the box shall be covered with plastic or canvas to avoid any expsoure to sunlight which will cause deterioration of paint or color of the drains.

7.4 Sequence of installation for Drains:

7.4.1 Safety

All site safety rules & regulations shall be complied with.
Supervisors will deliver tool box talks, relevant to this installation, to all operatives involved in the installation, and recorded.
All operatives will be equipped with minimum personnel protective equipment; hard hat, coveralls, safety boots, safety glasses.
The persons using cleaning fluid and solvent cement have to wear hand gloves.
All operatives fully understand the method of installing floor drains.

7.4.2 Pre- Installation Procedure

Before commencement of installation activity, the supervisor must ensure that:
Permission to start or Civil Clearances prior to installation has been given by the main contractor.
Materials necessary for the installation have been inspected & approved by the Engineer.
All relevant Shop drawings for Drainage System in the relevant area have been approved by CONSULTANT.
Necessary openings in the floor are provided as per the approved builders work drawing.
Scaffolding if necessary for installations are correctly built, safe & suitable for the purpose.
Floor Finish level and finish data are available to coordinate drain installations.

7.4.3 Installation Procedure

Select the correct type and model of Drains as per the approved material submittal.
If necessary or required, mock-up will be installed and approved by CONSULTANT prior to further installations.
Install the drains at the opening position as indicated on the approved Drainage System Shop Drawings (Details of Installation) below the slab level with respect to the pipe level shown in the drainage working drawing. Surveyor marked locations, from civil drawings will be followed for this.
Fix supports in position as per support details in the approved working drawing; ensure that all fixings are secure.
Extend drains inlet, minimum 100 mm above the structural finish level with the approved uPVC pipe material. The extension pipe to be glued to the gully trap with solvent cement.
Recheck the position of installed drains and Extension pipes before pouring concrete.
All inspections shall be inspected and signed off by CONSULTANT prior to pouring concrete.
The water proofing membrane will cover the extended pipe. The civil contractor to ensure that water proofing is done as per approved method statement.

The Floor Grating will be fixed once screed is cast by using a spirit level. The Floor Grating body is having the outlet connection matching with the internal diameter of uPVC drain pipe.