2 metal edge tongue groove plank.
Precast gypsum plank roof deck.
Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.
Metal edge tounge groove plank is a lightweight 12 psf precast concrete plank produced in a standard 1 6 x10 x2 size with a cold rolled 22 ga.
Where possible length should span two main purlin spans.
For extreme environmental conditions stainless steel edging is available.
Each plank weighs approximately 135 lbs.
Lightweight precast concrete planks.
A modern iteration of this arrangement is the quad deck system marketed by quad lock.
Decking that will be discussed is called gypsum roof decking.
Structural panel concrete roof deck is versatile and economic option for both low and steep slope roofs.
These include office complexes schools public buildings shopping malls and warehouses located throughout the united states.
The roof deck consists of a flat deck of 3 solid gypsum planks 1 wide and 3 long supported by doubled light gage channels in turn supported by structural steel framing.
Gypsum planks also come in other sizes.
There is a hung ceiling below which may be part of the assembly.
Because a roof deck is the foundation for the roof system the designer needs to coordinate the roof system design requirements for the roof deck with the structural engineer to ensure the performance of the roof system.
The planks are not poured on site but precast.
Gypsum planks are normally 2 thick 2 wide and 8 long and are factory laminated of two gypsum panels.
Factory laminate from two 25 mm 1 inch thick gypsum panels with top panel edge set back along sub purlin edge not more than 13 mm 1 2 inch.
Aside from roof decks this arrangement can also be deployed as a floor system.
50 mm 2 inches thick by 600 mm 24 inches wide by main purlin span.
It is one of the various types of insulated concrete forms icfs.
Collaboration with the structural engineer.
Unlike traditional roofing systems where multiple layers are required concrete roof deck is both the noncombustible structural sheathing and either the nail base or thermal barrier.
Precast modular concrete blocks make up this rather unique system.
Fabricated of gypsum board.
The building may date from the late 1930 s.
