3.0 Type N Roof Deck

3″ Type N Roof Deck

Type N Roof Deck is 3″ deep. Also known as deep rib, this structural metal roof deck provides a support surface for various types of roofing materials while its deep rib profile allows this roof deck to span further distances between roofing supports.

(410) 796-7968

Call (410) 796-7968 For Custom Orders

In Stock
Custom Lengths
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Roof deck products act alone in transferring horizontal and vertical loads into the building frame. Roof Deck does not work compositely with other building materials.

3.0 N Roof Deck

About O'Donnell Metal Deck:

Why wait? Job site change orders, problems, damaged deck, or new jobs. Whether you need metal deck for concrete or steel roof decking, you can count on O’Donnell Metal Deck. We are committed to providing the fastest and easiest service for metal decking. We offer fast same and next day delivery of our 3 N Deck to the East Coast — proudly supplying projects in Maryland, Washington DC, Virginia, West Virginia, Ohio, Tennessee, North Carolina, South Carolina, Delaware, New York, New Jersey & Pennsylvania.

O'Donnell Metal Deck Service Area

Available Gauges:

22 Gauge Icon

20 Gauge Icon

18 Gauge Icon

16 Gauge Icon

Available Finshes:

G60 Deck Icon

G90 Deck Icon

Painted Deck Icon

Galvanized G-60 zinc coated steel is the standard in the deck industry.

Galvanized G-90 is typically specified for exterior applications or project specific needs.

PTD or primer painted is an impermanent, provisional coating and is gray on top and bottom.

Deck Options:

Hanger Tabs:

Vented Metal Deck

Hanger tabs are designed for the support of ceilings and you should consult your engineer for individual allowable loads on single hanger tabs.

3" N Acoustical Roof Deck:

Type N Acoustical Deck

Type "N" composite cellular deck is utilized in exposed ceiling areas where a flat bottom deck is desired for aesthetic purposes under a slab and a composite slab is desired.

3" N Cellular Deck:

Type N Cellular Acoustical Deck

Type "N" cellular roof deck is mainly utilized in exposed ceiling areas where a flat bottom deck is desired for aesthetic purposes.


SDI Members:

We only supply products certified by SDI members that meet the the strict standards for engineering, design, manufacturing and usage of steel decks.

Made in America:

USA Domestic Steel Icon

Our products are made with US made steel. When mill certificates are required, we can provide you the material's physical and chemical properties. Contact Us for more information regarding mill certs for your project.

UL Classified:

UL Classified Logo

Our products adhere to the UL standards for 3" N deck. Refer to the UL Fire Directory for further information:
Type 1-1/2", 2" and 3" Roof Deck for use in Design No. P225.

SDI Recommeneded Spans:

Contact us for specific product submittals and load tables

(410) 796-7968

Recommended Maximum Spans for Construction and
Maintenance Loads Standard
  Type Span
Span Max. Recommended Spans
Roof Deck Cantilever
Ft.-In. Meters Ft.-In. Meters
N DECK 22ga. 1 11'-0" 3.35 m 3'-5" 1.05 m
22ga. 2 or more 13'-0" 3.95 m
20ga. 1 12'-6" 3.80 m 3'-11" 1.20 m
20ga. 2 or more 14'-8" 4.45 m
18ga. 1 15'-0" 4.55 m 4'-9" 1.45 m
18ga. 2 or more 17'-8" 5.40 m
Construction and maintenance loads:

SPANS are governed by a maximum stress of 26 ksi (180 MPa) and a maximum deflection of L/240 with a 200-pound (0.89 kN) concentrated load at midspan on a 1'-0" (300mm) wide section of deck. If the designer contemplates loads of greater magnitude, spans shall be decreased or the thickness of the steel deck increased as required. All loads shall be distributed by appropriate means to prevent damage to the completed assembly during construction.

N Deck Attachment Pattern:

3 In. N Deck Fastening Pattern

Your project Engineer will determine your attachment requirements for your design loads, building code and project requirements. The following standard 3" N Deck attachment pattern has been provided as a minimum recommendation for the product specified. The attachments should be made to from deck to support, deck sidelap to deck sidelap and seck to perimeter supports.

Gauges 16, 18, 20, 22
Height 3"
Comparable Names Type N, Deep Rib, 3DR, 3 N
Width 24"
Finish Prime Painted, Galvanized G-60, Galvanized G-90


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