Steel Roof Deck Corrosion

This exposed moderate to severe corrosion of the deck.

Steel roof deck corrosion.

Corrosion of the steel be controlled and not allowed to affect the integrity and strength of the product. Steel roof decks that were in contact with wet phenolic insulation will have major corrosion problems. Recent studies by various parties have examined premature corrosion of metal roof decks where fiberboard insulation was directly attached to the top surface of the metal deck and or where ferrous mechanical fasteners were placed through the fiberboard to anchor it to the deck 1 figures 1 and 2. In projects calling for a flat roof a roofing membrane with rigid insulation over polyiso board and steel deck is the most common assembly.

The roof ceiling assembly is vital to the long term success of a project. Horizontal as well as vertical loads may be considered. Steel roof deck shall be 22 gauge galvanized steel profile to match existing. Steel roof deck shall extend over three or more spans.

James river steel inc. This corrosion was initially thought to be dormant and isolated to active leaks. For most 1 1 2 38 mm deep roof decks the loss of one rib either by denting or penetration can be tolerated and no reinforcement will be required. Steel roof deck is the predominant structural component used in virtually all flat roofs.

1 in 1985 about three years after construction when several new penetrations were cut in the asphalt built up roof bur. Steel roof deck shall be as manufactured by u s. Roof deck shall have a minimum yield strength of 33 000 psi and a maximum sheet length of 42 0. Roof deck roof deck is designed to carry live and dead load without acting in conjunction with other materials.

2 01 steel roof deck a. Is a virginia based manufacturer of corrugated panels in stainless steel flooring aluminum galvanized steel galvalume and fiberglass for industrial and architectural roofing siding and decking. The deck is a structural panel that spans over roof joist or purlins to provide a flat. Corrosion resistant architectural metals industrial corrugated stainless steel.

If such corrosion is found at the roof cuts the deck may be unsafe to even walk on and may require total deck replacement. The discovery of corrosion of the metal deck was initially made on the roof of project no. Corrosion resistant roof fasteners either stainless steel or coated are crucial.