Type N (Deep Wide Rib) is well suited for applications where it is desirable to space the supporting members as far apart as possible. This is often the case in structures such as gymnasiums where it is usually more economical to minimize the number of long span structural members by using N deck to span large spaces.
Available with nested side laps only.
Available as an acoustic deck, type NA is manufactured with perforations in the vertical ribs, having an NRC rating of 0.65 with or without rigid roofing insulation, as tested in accordance with ANSI/ASTM C423 and E795
Type N is Factory Mutual approved for use as a component in Classes 1-60, 1-75 and 1-90 wind uplift construction. When ratings above 1-90 are required, the Contract Documents must specify special requirements in accordance with Factory Mutual Data Sheet 1-29, Section 2.2.13.