How far can you span a 2×10 roof rafter?
How far can you span a 2×10 roof rafter?
Max. Live Load 20 lbs/ft2 (956 N/m2)
| Maximum Span (ft – in) | ||
|---|---|---|
| Nominal Size (inches) | Rafter Spacing, Center to Center, OC (inches) | Lumber Grade |
| 2 x 10 | 12 | 27′ – 6” |
| 16 | 25′ | |
| 24 | 20′ – 9” |
What determines the spacing between trusses?
Trusses are usually spaced at regular intervals, typically 600 mm, 900 mm or 1,200 mm apart. The spacing depends on the mass of the roofing material and local practice. A range of truss types can be configured to attain different shapes.
How far apart can rafters be spaced?
But they do tend to space rafters in one of several industry-standard increments, typically either 12, 16 or 24 inches apart. These spacing intervals are measured “on center,” meaning that the measurement is taken from the center of one rafter’s horizontal surface to the center of the next rafter.
What size lumber can span 16 feet?
Max. Live Load 30 lbs/ft2 (1436 N/m2)
| Maximum Span (ft – in) | ||
|---|---|---|
| Nominal Size (inches) | Joist Spacing Center to Center (inches) | Lumber Grade |
| 2 x 6 | 24 | 9′ – 11″ |
| 2 x 8 | 12 | 16′ – 6″ |
| 16 | 15′ – 0″ |
Are 2×4 trusses OK?
2×4 rafters are not strong enough for low pitched roofs under any circumstance, so avoid if you are building a shed with a flat or very shallow roof. Lastly, remember that we are not talking about trusses in this article – just rafters. Trusses only use 2×4 lumber and are constructed using a “web” of 2x4s for strength.
How much weight can a 2×4 truss support?
The maximum weight capacity of a 2×4 stud is about 25,000 pounds to 30,000 pounds.
Under what circumstances you recommend trusses?
Trusses are used in a broad range of buildings, mainly where there is a requirement for very long spans, such as in airport terminals, aircraft hangers, sports stadia roofs, auditoriums and other leisure buildings. Trusses are also used to carry heavy loads and are sometimes used as transfer structures.
What is an attic truss?
An attic truss is a type of roof truss with an open space at its bottom center to accommodate a living space, with webbing above and on either side of this living space. The structure must be wide enough and the roof steep enough to allow space for a loft area with attic rooms on either side of it.
What are the chapter 16 requirements for roof trusses?
2319.17.2.1.2 Trusses shall be designed for wind loads per Chapter 16 (High-Velocity Hurricane Zones), uniformly distributed live, dead and concentrated loads, and such loads shall be indicated on the roof framing plans and the truss design drawings.
What information must the contractor provide to the truss manufacturer?
The Contractor shall provide to the Truss Manufacturer a copy of all Construction Documents pertinent to the Building Structural System and the design of the Trusses, including the name of the Building Designer if not noted on the Construction Documents (2.3.4.1).
What is the per code for prefabricated wood trusses in Florida?
Per Florida Building Code 2319.17.2.1 Design. 2319.17.2.1.1 Prefabricated wood trusses shall be designed by a registered professional engineer (delegated engineer) and fabricated in accordance with the National Design Standard for Metal Plate Connected Wood Truss Construction of the Truss Plate Institute (TPI).
