Lightweight precast concrete planks.
Precast gypsum plank roof deck.
There is a hung ceiling below which may be part of the assembly.
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.
Special galvanized wire mesh draped over the bulb tees distribute vertical loads to the bulb tee system and resist diaphragm loads.
Precast modular concrete blocks make up this rather unique system.
2 1 gypsum plank roof decking figure 1 2 1 1 gypsum planks are normally 2 inches thick 2 feet wide and 8 feet long and are factory laminated of two gypsum panels.
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.
Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.
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.
Continuous interior voids add structural.
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.
Collaboration with the structural engineer.
Each plank weighs approximately 135 lbs.
Gypsum deck plank for roof decks.
Serving as a combined deck and ceiling system the planks erect quickly to reduce on site labor needs and are capable of spanning long open spaces to aid design flexibility.
Aside from roof decks this arrangement can also be deployed as a floor system.
Formboards placed between the bulb tees contain the fast setting poured gypsum roof deck.
The planks are not poured on site but precast.
Note gypsum planks also come in other sizes.
The building may date from the late 1930 s.
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.
For extreme environmental conditions stainless steel edging is available.
Place plank on lower flanges of sub purlins or other framing with ends and edges supported.
The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.
