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Nov 11, 1975· Conventional poured deck construction utilizes bulb tees or truss tees as subpurlins. Both the bulb tees and truss tees have upstanding portions which govern the spacing due to the projection into the poured gypsum or concrete in an attempt to obtain resistance to uplift.
areas. Gypsum roof decks will usually perform satisfactorily except in the presence of moisture. Disintegration of the material and the board may result from sustained leakage. Anchorage of the supporting bulb tees against uplift may also be of importance, with significant deterioration. Floor and roof
The gypsum roof deck system is supported by bulb tees generally spaced from 24" to 32" on center. Formboards placed between the bulb tees contain the fastsetting, poured gypsum roof deck. Special galvanized wire mesh, draped over the bulb tees, distribute vertical loads to the bulb tee system and resist diaphragm loads. For this system to ...
SECTION 03 51 16 GYPSUM CONCRETE ROOF DECKS SPEC WRITER NOTES: 1. Delete between // ____// if not ... hotrolled bulbtees or folded sheet metal tees as required by design loads, spans and fire ratings. 2. Flanges: Provide 16 mm (5/8inch) minimum bearing for gypsum planks. ... (1inch) thick gypsum panels with top panel edge set back along sub ...
I am working on this building from around 1960 and it has an existing poured gypcrete roof deck system that spans to bulb tees that span to the steel structure. The client wants to close a bunch of existing roof penerations that had existing duck work with a steel plate bearing on the existing deck.
TECTUM Roof Deck Tile. TECTUM Roof Deck Tile is used with 218 bulbtee steel subpurlins to increase the span and diaphragm capacity of the deck. The rabbeted edges of TECTUM tile rest on the steel tee flanges of the 218 bulbtees. The space between the tile and bulbtees, are filled with gypsum grout for excellent anchorage and wind uplift ...
Subpurlins shall be designed to support live and dead loads of the roof deck. Gotrolled and coldrolled steel shapes other than bulb trees or truss tees shall meet the requirements of this specification.
DECK SOLUTIONS For over 65 years Tectum® Roof Deck has provided reliable, sustainable, acoustical roof decking solutions to meet the commercial construction industry''s needs. Tectum Roof Deck solutions are available in a wide variety of system configurations to match the unique needs of your building design. Tectum Roof Decks are ...
prestressed concrete BulbT''s shall conform to the requirements contained in File Nos. and 2 and as specified below. Prestressed concrete BulbT''s shall normally be designed using 1/ 2" diameter strands. Strand diameters of " and 1/ 2" (special) may be .
Material Weights Decking: Tectum, 1" thick Insulrock, 1" thick Poured Gypsum, 1" thick Vermiculate Concrete, 1" thick
Retrofitting Gypsum. RETROFITTING / REROOFING POURED GYPSUM DECKS 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. The bulb tees, which are very strong vertically but quite flexible horizontally, provide the long span strength.
Gypsum Board — (Classified or unclassified) — Supplied in sheets nom 2 by 4 ft to 4 by 12 ft, by nom 5/8 in. thick. Min weight psf. Applied perpendicular to steel roof deck direction with adhesive or laid loosely. End joints to occur over crests of steel roof deck with end joints staggered 2 ft in adjacent rows.
Structural Panel Concrete Roof Deck is versatile and economic option for both low and steep slope roofs. 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.
See Fire Resistance DirectoryMetal Roof Deck Panels* (CETW).2. Roof Insulation — Mineral and Fiber Boards* — 24 by 48 in. to 48 by 96 in., to be applied in one or more layers. Boards to be installed perpendicular to gypsum board (Item 4) direction with end joints staggered 2 ft in adjacent rows.
Gypsum decks shall have a minimum compressive strength of 500 pounds per square inch. 3. Gypsum decks shall have a minimum thickness of 2", not including the form board, and shall extend a minimum of .25" above the top of bulb tees or other structural supports.
than about one eight of an inch under moderate hand pressure. Sagging floors will most often indicate problem areas. Gypsum roof decks will usually perform satisfactorily except in the presence of moisture. Disintegration of the material and the board may result from sustained leakage. Anchorage of the supporting bulb tees
Optional system for interstitial decks and roof decks. SECTION 03 55 11 GYPSUM CONCRETE FLOOR DECKS. ... hotrolled bulbtees or folded sheet metal tees as required by design loads, spans and fire ratings. 2. Flanges: Provide 16 mm (5/8inch) minimum bearing for gypsum planks. ... (1inch) thick gypsum panels with top panel edge set back along ...
areas. Gypsum roof decks will usually perform satisfactorily except in the presence of moisture. Disintegration of the material and the board may result from sustained leakage. Anchorage of the supporting bulb tees against uplift may also be of importance, with significant deterioration. Floor and roof
SAFETY BULLETIN 85 October 17, 2013 GYPSUM ROOF DECKING B. Formboards are laid on the flanges of the subpurlins and serve as a form and remain in place to provide a functional underside of the roof deck. Formboards are gypsum sheetrock 1/2 inch .
for many decades. In roof decks, the irst widespread use of SCA was the poured gypsum roof deck on bulb tees that began over 70 years ago. It was produced by several manufacturers such as United States Gypsum Co., Bestwall Company, and Georgia .
May 23, 1978· A poured concrete insulated roofing structure installed over roof support members and having gypsum formboard with its underside adjacent the roof support members and secured to with its upper side adjacent rigid synthetic polymer , the polymer having spaces vertically therethrough over more than about 5 percent of the area of the gypsum formboard, and poured concrete over the .
4. Roof Decks: Use minimum 13 mm (1/2inch) fillet welds on alternate sides of subpurlins, both sides at end joints to main purlins. 5. For fire rated roof decks weld per fire test assembly. C. Gypsum Deck Plank for Roof Decks: 1. Place plank on lower flanges of subpurlins or other framing with ends and edges supported. 2.
Gypsum concrete construction,Bulb tees are used as structural sub purlin. They are fastened to primary framing and provide support for form boards that receive gypsum concrete. They also anchor deck against uplift forces, restrict deck movement due to temp changes and provide lateral bracing for roof structure. Gypsum concrete roof decks are lightweight, set rapidly (30minutes) and when used ...
SHEETROCK Formboard, a rigid gypsum board treated to resist mildew*, and fiberglass formboard are both available. Fire ratings are available with 2inch gypsum slabs and exposed tees. Ideal for almost every roof deck need, concealed or exposed.
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