Gypsum Precast Roof Decking

They also have acoustical value and are oftentimes used in schools and restaurants.

Gypsum precast roof decking. Weights vary with the dimensions of the plank. A grey area between combustible and noncombustible decking is the structural wood fiber deck system. This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. For fire rated roof decks weld per fire test assembly.

These fibrous decks generally have a gypsum like or cementitious binder and combine the functions of a roof deck thermal insulation and finished ceiling. Low density insulating concrete roof decks are monolithic composite systems cast over galvanized metal decks structural concrete wood decks or existing roof systems. Structural panel concrete roof deck is versatile and economic option for both low and steep slope roofs. 2 1 2 the decking is usually installed in the following manner.

Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets. The poured gypsum roof deck consists of steel bulb tees a form board usually composed of gypsum or fiberglass wire reinforcing mesh and the gypsum concrete. Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins. Gypsum concrete roof deck system.

Formboards placed between the bulb tees contain the fast setting poured gypsum roof deck. Many of these installations continue to perform and provide support to roofing materials that have been added over time. Introduced as a roof deck substrate in the 1940 s. Each plank weighs approximately 135 lbs.

Place plank on lower flanges of sub purlins or other framing with ends and edges supported. Underlayment systems gypsum soundmat floor leveling. 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. The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.

Gypsum deck plank for roof decks. 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. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. Gypsum planks also come in other sizes.

Gypsum roof decking 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. The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength.