Do you know that buildings with GRC moulding as decorations are good looking? In this article, I am going to show you how to fabricate and erect your GRC moldings in your project.
See the photo of our project where the GRC moldings are installed and how it gives a majestic view.
The GRC molding is commonly installed at the corner between the column and soffit of the beam. As you can see in the photo above.
So without further ado. Here is the method statement for stone finish GRC fabrication and erection.
Method Statement for Stone Finish GRC Fabrication and Erection
The purpose of this method is to define the specific tasks to be performed by Company relating the GRC works and to make sure the quality of the output including the safety of the works.
• Release agent
• Glass fiber
• Cement slurry
4.1.1 Once the shop drawing is approved production drawing is then made incorporating site dimensions and it would then be issued to the production department.
4.1.2 Depending upon the complexity of the item mould material is to be decided (i.e. more complex design rubber is used instead of GRP.)
4.1.3 After finishing of the gypsum pattern side flanges are then made.
4.1.4 Rubber is poured for rubber moulds, if the mould is to be made of GRP then the gypsum pattern is to be laminated with GRP.
4.1.5 After releasing the mould from the gypsum pattern, the surface of the mould should be finished where the GRC would be cast.
4.1.6 After checking the mould as per the approved dimension it would then be sent to the casting department for rechecking prior to casting.
4.1.7 Release agent is sprayed on the mould so that after casting the GRC is easily demoulded.
4.1.8 Pigment dyes are mixed in a clean cup according to the required proportion to achieve the required color for GRC.
4.1.9 Prepared dyes composition is mixed with slurry and rotated properly so that it is mixed evenly.
4.1.10. The glass fiber and cement slurry will be metered to the spray head at rates to achieve the desired mix proportion. These will be checked prior to spray up of each element. The distribution of fiber in the mix will be controlled by the operator in such a way as to be as uniform as possible.
4.1.11 Mist coat consisting of the basic composition without fiber is sprayed on the mould. The thickness of the coating will be 3 mm maximum in order to avoid an unreinforced surface.
4.1.12 Spray up the main body of the material that would be done before the mist coat is set.
4.1.13 The method of spraying the main body of material will achieve the greatest possible uniformity of thickness and fiber distribution which is randomly checked by depth gauge.
4.2.1 Survey of the whole building structure is done in order to take correct site dimensions for the preparation of production drawings.
4.2.2 If it is a high rise building then the dimensions are taken level-by-level as the building level gets completed.
4.2.3 Discussions with the main contractor are carried out for site dimensions in order to match its construction program or required priorities.
4.2.4 After confirming the site dimensions they are released for production.
4.2.5 After manufacturing the elements which are received on-site are to be re-checked by site engineer for confirmation.
4.2.6 Materials received on-site will be properly stored in a pallet with a nonstaining material spacer between two panels in order to avoid any deformation or damages to panels.
4.3.7 The marking and leveling will be done by the concerned site engineer as per the site dimensions are given in drawing to finalize the locations of all the GRC items on the existing structure.
4.3.8 If the item is cornice or moulding which are all around in linear meter, then the first and last corner pieces will be fixed with proper alignment and level.
4.2.9 A thread will be tied between the two pieces to align the external face level of the complete GRC items.
4.2.10 Hole positions for the other GRC items will be marked on the concrete surfaces to match the embedded threaded bars in the GRC items.
4.2.11 Holes are then drilled to the required depth.
4.2.12 Holes are properly cleaned of dust by an electrical air blowing machine.
4.2.13 The GRC element is to be lifted by crane and is then properly aligned. Resin mortar is then inserted in the previously drilled holes in concrete.
4.2.14 Joints are sealed with the silicon for consultant approval.
Ensure that scaffolding is installed prior to installing GRC, scaffolding should be checked by safety inspector.
Craddle would be used if in case GRC moulding is to be installed on a high-rise building.
Barrication is to be provided under exclusion zone.
All works shall comply with the municipalty safety standards.
- Method Statement for Application of GRP Lining Inside Water Tank
- Method Statement for Superstructure Part – 2
- Method Statement for Application of Waterproofing Membrane
There are many projects that I have been involved with and I was able to complete but the project that has no GRC moldings on its outside view looks unpleasant.