The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.
Gypsum plank roof deck.
Stagger joints in adjacent courses.
The only cementitious structural panel approved by factory mutual fm fm approval standard 4472.
Gypsum concrete roof deck system.
1 4 dens deck roof board.
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.
Introduced as a roof deck substrate in the 1940 s.
This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate.
Support end joints with cross tees not supported by framing.
Place plank on lower flanges of sub purlins or other framing with ends and edges supported.
It provides exceptional bond and low absorption in adhered systems and offers sustainable design for all types of roofing systems including single ply fluid applied built up spray.
A type of roof decking that will be discussed is called gypsum roof decking.
A concrete roof deck that can be combined with other noncombustible materials to create 1 and 2 hour fire rated roof ceiling assemblies.
The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength.
Securock brand gypsum fiber roof board s unique fiber reinforced homogenous composition gives the panel strength and water resistance through to the core.
Cut plank to fit at ends and framed openings.
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.
Gypsum deck plank for roof decks.
1 4 spans flute widths up to 2 5 8 flexural strengths parallel lbs.
R values 28 tested in accordance with astm c518 spannings.
Densdeck roof boards can replace any generic type x gypsum board in any roof assembly in the ul fire resistance directory under the prefix.
Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.
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.
Formboards placed between the bulb tees contain the fast.
The gypsum concrete which spans tee to tee encases the tees and.
