Gypsum Board Roof Decking

To act as a thermal barrier under combustible plastic insulations in roof systems.

Gypsum board roof decking. Securock brand gypsum fiber roof board s dense concentration of gypsum and cellulose fibers provides exceptional panel and bond strength low surface absorption and superior wind uplift performance with no face layer to delaminate. Gypsum concrete roof deck system. Westpro offers woven wire mesh used in monolithic roof decks and interstitial service space applications. Formboards placed between the bulb tees contain the fast.

The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center. As a levelling layer for the air vapour barriers in a conventional roof system. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets. This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate.

I m trying to determine load capacity for the roof of an indutrial builing that s sheathed with 2 thick gypsum board no metal or wood decking just this 2 1 2 gyp board ceiling on steel joists. 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. Gypsum boards are commonly used on steel roof decks for these main reasons. To provide a smooth surface for a protected membrane roof system.

Introduced as a roof deck substrate in the 1940 s. 5 8 densdeck roof boards can replace any generic type x gypsum board in. Apply the gypsum board perpendicular to and on top of roof trusses or rafters prior to the installation of combus tible roof sheathing. 5 8 15 9 mm gypsum board underlayment roof covering combustible panel sheathing felt install 5 8 in.

Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength. The sustainable design has earned independent certification from scientific certification systems. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks.

Keydeck mesh is made up of 2 hexagonal mesh composed of woven 19 gauge galvanized wires with an additional 16 gauge galvanized longitudinal wire placed at every 3 interval of its width. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. Shown to withstand delamination deterioration warping and job site damage far more effectively than paper faced gypsum board and other conventional roofing products such as wood fiberboard and perlite certified by ul for use as a fire barrier over combustible and noncombustible decks in accordance with the ansi ul 790 and ulc s114 test standard.