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.Structural supports gypsum concrete roof decks and their underlying form boards shall be supported by sub purlins that span the distance between the main purlins or joists.
Support end joints with cross-tees not supported by framing.Cut plank to fit at ends and framed openings.Provide continuous 16 mm 58-inch minimum bearing for plank support at deck perimeter, plank ends and openings exceeding 200 mm 8inches.Mix gypsum concrete thoroughly using a minimum amount of water to form a thick,.
Sheetrock formboard, a rigid gypsum board treated to resist mildew, and fiberglass formboard are both available.Fire ratings are available with 2-inch gypsum slabs and exposed tees.Ideal for almost every roof deck need, concealed or exposed.
Flanges provide 16 mm 58-inch minimum bearing for gypsum planks.Galvanize or factory coat sub-purlins with manufacturers standard primer.Open web truss-tees fabricate from cold-formed steel wire conforming to astm a82.Hot-rolled bulb-tees rail-shaped, fabricated from hot-rolled steel conforming to astm a36 or astm a499.
Vibratory gypsum screen deck - me mining machinery.8 12 2018 its use increased since it provided roof deck fire protection diaphragm values and an economical substrate for roofing gypsum decks incorporated the placement of bulb tees generally spaced 24 to 32 inches on center a fiberglass formboard galvanized.
Gyps um roof deck re pair repl acem en t proce dures gy psum co n cre te w ire mesh f ormboar d b ulb or truss tee history gy psum cast o v er f ormboards and str u ctu r all y supported b y bulb tees or truss tees was i n trod u ced as a roo f deck subst rat e in the 1940s.
Place gypsum deck panels on bottom flanges of sub-purlins with 16 mm 58-inch minimum continuous bearing.Place gypsum deck plank over gypsum deck panels, with off-set edges up to form a t receptacle for gypsum grout.Cut to fit around openings shown.Install plank to conform to fire test assembly.
East lawrence recreation center lawrence, ks tectum i roof deck key selection attributes sound absorptionnrc up to 0.80 r-value up to 6 spans up to 6 feet 50-pound design load standard widthsdiaphragm shear up to 542 dsnlf nailable surface low slope applications tectum i structural acoustic roof deck provides excellent sound absorption, a thermal.
Insulrock roof slabs may be applied directly to the roof framing on spans up to 48 and on spans over 48 in combination with sub-purlins.Table of contents characteristics general descrlptlon roof deck, application, design data roof deck short span roof slabs over steel joists roof deck long spans exceeding 40 installed on sub-purlins.
Tectum i roof deck from armstrong building solutions.Excellent sound absorption, thermal barrier, compatible w variety of insulation roofing materials.
Gypsum concrete is a poured system composed of a mixture of gypsum, wood chips, and shavings combined with water.After mixing at the job site, the substance is poured over a wire mesh, which is supported on form boards of either fiberglass, gypsum board, or other material.The minimum acceptable thickness of a gypsum concrete deck is 2.
Loads of the roof deck.2 hot-rolled and cold-rolled steel shapes other than bulb tees or truss tees shall meet the requirements of this specica-tion for subpurlins.2 cross tees, shall be not less than 11 4 in.75 mm wide by 1 2 in.7 mm high, fabricated from not less than 26 gage zinc-coated steel conforming to.
The building deck structure of claim 1 wherein said formboard is selected from the group consisting of felted rock wool materials, moisture permeable gypsum, moisture impermeable gypsum and fiber glass.The building deck structure of claim 2 wherein said formboard is gypsum formboard.
Trade mark 2 guide to roof construction size average w.Value relative cost recommended uses pages usg gypsum plank 2 in.58 1 for roof slabs of light weight, speedy erection 4 and 5 c.31 n| l2 m tongue and groove c.53 1 for roof slabs with close beam.
Lightweight insulating concrete roof decks shall be designed with poured in place slope, including saddles and crickets as required so as to provide positive drainage.Deck support lightweight insulating concrete roof decks shall be applied over - galvanized metal form deck panels.- bulb tee and form board systems.
The following sections from the pci design handbook include interaction curves, load tables, and section properties for various precast concrete components.You can access tables from previous editions of the handbook as well as the current edition.For additional explanations on using these tables, refer to the respective handbook editions.
Finishing systems and roof decks are provided which include a gypsum board having a set gypsum core faced with a fibrous mat.The gypsum core includes one or more additives which are effective in simultaneously improving the water and fire resistance of the board.In preferred embodiments, the board has sufficient water-resistant additive for absorbing less than about 10 water in an astm c.
An insulated decking structure and method using a sheet metal structural shape as a purlin or sub-purlin which is symmetrical about a vertical bisecting plane and having a central vertical web, two legs projecting downwardly from the bottom of said web at an angle of about 45 to 75 to the horizontal, each leg having a substantially horizontal flange projecting outwardly at its lower.
Thus, using standard 32 inch wide gypsum formboard, i have found two strips of polymer foam 13.7 inches wide, spaced 1 inch in from each side and 12 inch in from each end leaving a 212 space between the strips permits satisfactory drying and results in an excellent roof structure.
Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard.A82a82m specification for steel wire, plain, for concrete reinforcement.A185a185m specification for steel welded wire reinforcement, plain, for concrete.A568a568m specification for steel, sheet, carbon.
Gypsum plaster - an overview sciencedirect topics.When gypsum loses its water component it forms the mineral anhydrite caso 4 when anhydrite absorbs water it becomes gypsum this ease of exchange is the basis of gypsum s use in plaster consequently the two minerals are very similar to one another and are only easily distinguished by heating a sample in a closed tube.
Pop gypsum ceiling casting.Famous brand high quality newly designed movable jaw.Most famous crusher brand in china crusherasia mine machinery is a famous crusher most advanced famous brand mobile jaw crusher mobile stone crusher plant, strong adaptability mobile crusher from famous brand.Hot sales famous brand high capacity grinding mill ball,famous brand high 7,660,000.
Bulb tee sub pur.Lin for short span roof tile 8.660 weight per yard section modulus moment of inertia based on 2-6 spacing of tees total roof load of 50 lbs.Maximum span fs 16000 m 6-9 deflection maximum span fs.I8000, m deflection 25 7-2.4 standard clip- bulb tee sub-purlio hook bolt.
Prestressed concrete bulb-ts shall conform to the requirements contained in file nos.01-1 and -2 and as specified below.Prestressed concrete bulb-ts shall normally be designed using 1 2 diameter strands.Strand diameters of 0.6 and 1 2 special may be used when necessary to meet design requirements.
The t-bar led by jlc tech replaces selected cross tees of the armstrong suspension system where light is desired.The xled clip is mounted at each end for easy installation into armstrong 1516 or 916 suspension system allowing the fixture to become a part of the ceiling assembly eliminating the use of support wires.
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