Method Statement Template for Gypsum Ceiling- Double Layer Partitions

 

Method Statement for Gypsum  Ceiling-Double Layer Partitions   

  

SCOPE OF WORKS.

The scope of this Method Statement is to cover the suspended ceilings works.

The purpose of this documents is to establish systematic procedures for

suspended ceiling  works and to ensure that it is done as per the approved shop

drawings, project specifications  and to make it all the people understand the

 sequence of works.  

General.

Prior to works commencing, the Site Engineer shall ensure that the following

activities have been completed and signed-off by the Consultant (Shop Drawing,

Material Submittal and Method of Statement). 

The Site Engineer shall ensure that the necessary Statutory Authorities approvals

have been received. 

Materials: 

Materials to be used shall be as per the approved material and should be

inspected prior to use in gypsum ceiling works and all fixation elements will be as

per approved. 

• 100 mm x 0.90 mm Wall Stud - 4.0m 
• 100 mm x 0.9 mm Deflection Head Track 
• Flat Strap - 90mm x 0.90 mm thick 
• Backing Rod 10mm 
• 6 x 60mm Ceiling Anchor with Eye Hole 
• Double Spring Clip - 4mm 
•  4mm Wire Rod - 40m 
• T24 Cross Tee - 26 mm x 24 mm x 600 mm 
• T24 Cross Tee - 26 mm x 24 mm x 1200 mm 
• Wedge Anchor - 6x40mm 
• Jointing Tape - Fiber 
• 15mm Firewall Gypsum Board 
• Furring Channel 64x35x23, 0.50 mm 
• GI L-Angle 25x25, 0.50 mm 
• GI L-Angle 25x25, 0.90 mm 
• Main Channel 38x12x12, 0.50 mm 
• Main Channel 38x12x12, 0.90 mm 
• 13mm  GlassMat Gypsum Board 
• Hilti - Fire and Acoustic Sealant Sausage - CP 606 
• Hammer Screw, Size: 6 x 40mm 
• HSA M8 x 54.5 mm Standard Stud Anchor 
• Hex Washer Head Self Drilling Screws M5.5 x 25 
• Jointing Compound - Exterior 
• GM R100 - Jointing Compound 
• 12.5mm Moisture Resistant Gypsum Board 
• T24 Main Tee - 38 mm x 24 mm x 3600 mm 
• T24 Perimeter Angle - 24 mm x 24 mm x 3000 mm 
• 12.5 mm Regular Gypsum Board 
• Self-Drilling Screw M3.5 x 35mm 
• Self-Drilling Screw M3.5 x 45mm 
• Self-Drilling Screw M3.5 x 55mm 
• Self-Tapping Screw M3.5 x 25mm 
• Slotted Web Cleat 75mm 
• Wafer head screw M4.2 x13  

PREPARATION & PLANNING.

Prior to the commencement of this activity or work, necessary work permits shall be

obtained as  required in the contract condition. All HSE activities related to the

project, will be based on the company issued HSE Management System

guidelines. All quality assurance and quality control  activities will be in line with the

specified requirements of the contract.   

PRECONSTRUCTION ACTIVITY.

Make sure that all the related submittals such as shop drawings, method statement

and material  submittals are approved before commencing the work. 

All materials are subjected to Material Inspection Request (MIR) before site usage.

All materials will be pre-checked for any defects or damages before use. On the

working level, material will be stored in designated areas which will be cordoned

off, arranged neatly, considering the loadings on the slab i.e., materials will not be

stored on a single pile but rather distributed and spread out evenly to distribute

load. Method of shifting from store to floor level will be done by pickup, crane etc. 

 

EXECUTION.

Delivery, storage, and handling:  

• Material inspection request (MIR) shall be available at time of delivery which includes delivery note, approved material submittal and material test certificate (if available). 
• Upon delivery, all materials shall be inspected & approved by consultant prior to storage /commencement of work. 
• After inspection, materials shall be protected by protection materials. 
• A secure and conditioned store is required. Material store is subjected for monthly internal audit. 
• Wherever possible protection should not be removed till final installation.  

Work Methodology: 

Double Layer Partitions.

 STEP 1 

1. Fix “Wall Angles” to walls and around columns etc. at 600 mm maximum centers by means of hammer screws making allowance in the ceiling height for the thickness of the gypsum board(s). 

2. Determine the direction of the “Main channel” with first main channel starting not more than150mm A from the wall and the subsequent main channels as per specified centers mentioned in the technical proposal. 

3. Determine the position of the “Suspensions” as per specified centers mentioned in the technical proposal. 

4. The first and last - suspension shall not be more than 150mm B from the wall.  

STEP 2. 

Suspension: 

1. Cut the “L- Angle for vertical Suspension” 100 mm more than the suspension length. 

2. Snip one flange of “Suspension” at 100mm from one end and bend it to form a L. Secure the bend part by screwing the overlapping metals with drill point M4.2 wafer head screw. 

3. Drill the upper slab with suitable drill @ Specified centers along the line of the Main channel offset by 50mm, through the prepared and positioned “Suspension”. 

4. Hammer the Wedge anchor to fix the “Suspensions” to the upper slab. 

5. Similarly fix the “Suspensions”. Arrange the same along the line using laser or string.  

STEP 3.  

1. Position the Main channel along the pre-determined direction and connect it to the hanging suspension L- Angles using 2 wafer head screws positioned diagonally at each intersection. The  first and last main channel shall not be more than 150mm A from the wall. 

2. Similarly fix the suspension channels and main channels, such that the successive main  channel is spaced not more than the specified main channel centers. When Main channels are  spliced, the ends shall be overlapped not less than 300 mm D mm with flanges interlocked and  securely fastened with 4 wafer head screws. 

3. The main channel shall not touch the surrounding walls and a gap of not less than 25mm to be maintained.  

STEP 4.    

1. The furring channel is screw fixed crosswise to main channel’s flange with 2 wafer head screws at each intersection. 

2. Web of the furring channel shall rest on the perimeter wall angles on 2 sides of the ceiling. 

3. The first and last furring channel shall not be away by 300mm from the wall and successive channels are spaced at specified furring channel centers. 

4. When Furring channel are spliced, the ends shall be overlapped not less than 200 mm E and securely fastened with 4 wafer head screws.  

STEP 5.

1. Gypsum board’s longitudinal edges to be positioned crosswise to the furring channel. 

2. If required , a shadow gap as per project requirement to be maintained at perimeters. 

3. The boards edge close to the wall shall be secured with – shadow line /casing / stopping bead .optional) 

4. Place the cut joints at the centre of furring channel and stagger systematically by half board  length 

5. The boards to be screw fixed to the corner profiles(wall angles) and furring channel using  specified screw. 

6. The screw length shall be of sufficient length so that the threaded portion shall penetrate not  less than 9mm into the framing members. 

7. Screw shall be space not more than 300mm centers along the framing members. 

8. Place screws not less than 9mm and not more than 13 mm to edges of the gypsum board.     

STEP 6.

1. Paper and gypsum burrs due to board cutting to be removed from the edges. 

2. Self-adhesive Fiber tape to be applied for vertical and horizontal board joints 

3. Jointing compound to be applied for vertical and horizontal gaps. 

4. Screw head covered with jointing compound termed as Spotting. (Note: wherever board cut  square edges are there, V groove is made to receive the jointing compound). 

5. Apply the first layer (100 mm wide) on top of Fiber Tape and make it even. 

6. Allow this to dry, lightly sand to remove any imperfections. Remove the dust from the joint. 

7. Apply the second layer (250mm wide) and make it even. 

8. Allow this to dry, lightly sand to remove any imperfections. Remove the dust from the joint. 

9. Apply the third layer (300mm wide) and make it even. 

10. Allow this to dry, lightly sand to remove any imperfections. Remove the dust from the joint.

11. Same method to be followed for internal and external corners. (Note: For the external corners, P01 or Corner tape is recommended to be used.) 

Next article we will explain the methodology of 2Hr Fire Rated Ceiling  method statement.

- See risk assessment template for Gypsum Board Ceiling.