Steel decking

Externa.1 Floa.ting Roofs. Pontoon roofs are common for floating roofs from diameters of approximately 30—100 ft (10—30 m). The roof is simply a steel deck having an annular compartment that provides buoyancy (Fig. 5a). Double-deck roofs (Fig. 5b and 5c) are built for very small floating roofs up to about 30 ft (10 m) in diameter. These are also used on diameters that exceed about 100 ft (30 m). These roofs are strong and durable because of the double deck and are suitable for large-diameter tanks. 

SD1 1987, Steel Deck Institute Design Manual, Steel Deck Institute, Canton, OH, 1987... 

Water from water spray or deluge sprinklers is highly effective when applied on steel decks for pool fires, and can be expected to prevent failure. In jet fires, it has relatively little effect on the failure time. 

Sometimes it is necessary to apply acid-proof brick or monolithics such as trowelled epoxies to a steel decking. This practice is not recommended for the following reasons ... 

Unless the steel deck is rigidly supported, it will flex under loading, causing the brick or monolithic lining to crack. 

If the steel decking is restrained from expanding during temperature changes by support pillars or walls, it will flex and crack the flooring. 

Steel decking transmits vibrations which have been known to crack plastic monolithic coatings and brickwork. 

If the designer decides to protect a steel deck with acid-proof brick, he should consider the following recommendations ... 

The steel decking should be sufficiently thick and be rigidly supported at frequent intervals to prevent any flexing or bulging due to movement or thermal expansion. The design criteria should be the same as for flat bottoms vertical tanks, as described previously. 

Design and install insulated steel deck roofs in accordance with the UL Roofing Materials and Systems Directory or the FM Approval Guide and appropriate FM data sheets. 

Reinforce insulated steel deck roofs with additional mechanical roof fasteners. 

The ceiling of the building was constructed of steel decking. The decking was insulated with vermiculite which was held in place with a coating of the formulation. The spray machine was used to coat the... 

In this case, we begin the process with the identification of one of the known structural systems, which are commercially available and could be used in our design case. Let us assume that in our case the reference system is in the form of trusses supporting a steel deck with concrete on the top of it. Such a system was used in the World Trade Center, but it is also widely used in industrial buildings because of its relatively low cost, simplicity, constructability, and rigidity. 

The new test method now being used to test roof deck constructions, that contain polystyrene directly over steel decks, is similarly validated. To complete the understanding and acceptance of the new test, UL is documenting the White House Test and the new smaller scale fire test procedure and acceptance criteria. The methods are being reviewed under the UL standards revision process and, upon completion, will be submitted to the ANSI approvals process, to be incorporated into UL 1256 [53]. 

C) The material being handled by the crane is a structural steel member (for example, steel joists, beams, columns, steel decking (bundled or unbundled) or a component of a systems-engineered metal building (as defined in 29 CFR 1926 subpart R). 

Steel Deck Corrosion under Phenolic Roof Insulation. Phenolic foam roof insulation (PFRI) was hailed as the next panacea of roofing in the 1980s, as it had all the desired qualities of ideal roof insulation. It exhibited exceptional insulation with no thermal drift, great dimensional stability and easily passed fire resistance tests [1]. However, severe steel deck corrosion was observed as soon as three years after commercial PFRI was installed on some steel decks. 

Assemblies between steel and aluminium can be simplified by using transition joints that are weldable on both sides (Figure B.3.4) [18]. Their use has become widespread in shipbuilding for welding joints between steel and aluminium (such as aluminium superstructures on a steel deck) and could be used also in the transportation sector [19]. 

Except for the relatively simple case of tools or other metal objects dropped on a concrete floor or steel deck coated with an oxidizer-saturated paint or other sensitive material, which would have constituent parameters paralleling those of... 

Orthotropic steel decks are represented in a similar way. For composite bridges with concrete decks, the cross section of the relevant beam element is composed of the transverse girder and the effective width of the concrete slab. 

In the above equations, ht is the beam depth and hcs is the overall slab thickness including the depth of the steel deck, but the model assumes that the interaction between the slab and the column only occurs over the slab thickness above the steel deck, hds, to represent actual test conditions. The parameter, tbf, is the beam flange thickness. For components 1 and 5, the deformation varies among the series of n parallel springs used over the slab thickness. For the concrete in compression (Component 1), a distinctimi is also made between unconfined (5i5) and confined (8i i) concrete fibers. Unconfined concrete cmidition is assumed above the slab reinforcing steel (of thickness hds,nc in Fig. 13b), and therefore, the parameters Ac and A c correspond to the... 

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