These include office complexes schools public buildings shopping malls and warehouses located throughout the united states.
Poured gypsum roof deck weight.
Gypsum decks incorporated the placement of bulb tees.
Damage that can cause loss of the structural composite strength is most likely to come from leakage of water into the roof deck from unattended roof leaks.
Its use increased since it provided roof deck fire protection diaphragm values and an economical substrate for roofing.
Densdeck roof boards are easy to.
Gypsum concrete roof deck system.
Place plank on lower flanges of sub purlins or other framing with ends and edges supported.
Many of these installations continue to perform and provide support to.
One concern is deck integrity and prolonged roof leakage could corrode the wire reinforcing and leach binder to the point that an unaware person could fall through the deck.
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.
2 2 gypsum concrete roof decking figure 2 2 2 1 gypsum concrete is mill formulated and composed of calcined gypsum and wood chips or shavings.
Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s.
Free water will cause the gypsum concrete to decompose and lose structural strength.
Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins.
For fire rated roof decks weld per fire test assembly.
Poured gypsum decks provide stable structural properties if kept moisture free.
Bulb tees are high strength lightweight steel sections.
Gypsum roof decking is then allowed to set and covered with a water tight roofing material.
Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.
The fiberglass mat faced noncombustible as described and tested in accordance with astm e136 nonstructural gypsum core panels provide superior fire resistance and protection from hail damage and hold up well under normal construction and maintenance foot traffic while stiffening and stabilizing roof decks.
Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks.
Tectum 1 thick 2 0psf insulrock 1 thick 2 7psf poured gypsum 1 thick 6 5psf vermiculate concrete 1 thick 2 6psf.
