What is Type A Roof Deck?

Type A roof deck is the “original” term for this deck profile, though recently the Steel Deck Institute has promoted the more descriptive name, “Narrow Rib Roof Deck”, or “Type NR”.

Unlike other types of metal roof decking, Type A roof deck is rarely used for new construction projects, but is often needed for repair and re-roof projects. This is due to the fact that Type A roof decking is the least efficient 1.5” deep steel roof deck section. Compared to Type B and Type F roof decks, Type A metal roof decks have the lowest strength-to-weight ratio. As with all steel products, the lighter the section, the more economical it will be. And since Type A roof deck cannot carry as much load at longer spans as B deck and F deck, the steel supports below the metal deck must be spaced closer together. In turn, a smaller support spacing results in more supports and higher costs for the building owner.

USA Popular design Type A steel roof decking rolling machine picture for your reference:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The drawing profile is as following:

 

 

 

 

 

Based on the drawing profile ,we design the Type A steel roof decking rolling machine .

Type A steel roof decking rolling machine Work Flow .

5T Hydraulic Decoiler-→Manual Pre-Cutter Device- + Feeding Guide Device-→Roll Forming System- >Hydraulic Post Cutter Device-→AUTO Exit Rack

 

 

 

 

 

Advantages of Metal Floor Deck Machine are as follows:

1.Floor decking sheet produced by this machine has the features of low cost , light weight buy high strength ,shorten building period and re-cycle use .

2.Save material with no waste.

3.Easy operation , low maintenance cost

4.It is easy for installation.

When using Type A roof deck to cover skylights, note that 20 gauge deck or heavier will probably be required since 22 gauge will only span 3’-9” (see maximum unshored spans for one (1) span). As shown in the Maximum Construction Span table on this page, the maximum span for one span is 10 inches shorter than the maximum allowed when two or more spans are covered by each deck sheet.