Is metal decking fire rated?

Unlike concrete or wood roofs, where the risk is obvious and intuitive, metal deck roofs almost always comprise some combustible materials. To complicate things further, they have external fire ratings and internal fire ratings that are not interchangeable.

How far can metal decking span?

Type N-24 is a 3” deep, 24” wide long span panel. The strength of a panel is a component of the depth and the thickness of the panel. The deeper the panel is, the stronger the panel is and the further it can span. Type N-24 can span distances ranging from 6 feet up to 16 feet.

What is the most common depth for a metal roof deck?

B Deck, which is also referred to as BW-36, Wide Rib, 1.5B, BI, BV, or BIV, is a wide rib, 1.5 inch deep metal deck. It the most modern and most common type of metal roof decking.

Are metal roofs fire resistant?

Most metal roofing is considered to be Assembly-Rated Class A, meaning the covering and underlying materials provide additional fire protection. This makes metal roofs one of the most fire-resistant options on the market for roofing materials.

What class rating is a metal roof?

Class A fire rating
Since metal roofing is designated with a Class A fire rating, it is one of the most non-combustible roofing materials with the greatest strength to stand up to fires.

Are metal roofs heat resistant?

What type of roof is fire proof?

Class A is the most fire-resistant and should be the choice of anyone living in wildfire-prone areas. Common Class A roof coverings include asphalt fiberglass composition shingles and concrete or clay tiles.

How far can metal roof overhang without support?

3: The panels at the eave side of the roof should overhang into the gutters 1 to 1-1/2 inches. If installing metal on a non gutter application you can overhang the panel up to 3 inches.

How far can a deck overhang the beam?

Maximum allowable overhang cannot exceed 1/4 of the actual main span.

What gauge is metal roof decking?

Metal decking is most commonly 16, 18, 20, and 22 Gauge in thickness.

Does a steel roof need to be vented?

Some materials in the roof assembly may require venting of the steel roof deck, such as roof systems with light weight insulating concrete. Venting does not impact the structural performance of the steel deck. Deck should not be specified as vented when it is not required.

What is the standard length of a steel deck?

Typical lengths of steel deck panels that are safe and efficient for erection are in the 20 to 35 foot range. For erection safety, 3 span sheets are the desirable minimum sheet length. A mini- mum 3 span condition should not be specified because single and double spans are required for layout in most buildings.

What is the depth of a steel deck profile?

steel deck profiles have depths that range from 13⁄ 8” to 71⁄ 2”. Panel lengths range from 5 feet to 45 feet. Steel deck panels are supplied with both galvanized and painted finishes to meet an array of project finish requirements. Product Description To assist designers with specifying the correct steel deck

What is the best decking for exposed steel design?

Our new Smooth Series™ cellular deck offers a blemish free beam-to-pan rivet attachment, providing a clean surface ideal for an exposed steel design. When noise reduction is a necessity, ASC Steel Deck’s Acustadek®panels offer acoustical noise reduction capabilities with aesthetic features which complement its use on exposed applications.