1,000 poundsClick to see full answer. Herein, how far can you span a 2×4 Rafter? Max. Live Load 20 lbs/ft2 (956 N/m2) Maximum Span (ft – in) Nominal Size (inches) Rafter Spacing, Center to Center (inches) Lumber Grade 2 x 8 24 17′ 2 x 10 12 27′ – 6” 16 25′ Also Know, how much weight can roof trusses support? Typical Loads If the bottom chord of a roof truss functions as a floor joist, such as in an attic room, it carries a live load that also varies by use, but a typical live floor load for a residential space is about 40 pounds per square foot. Just so, can I use 2×4 for rafters? The coup roof is good for about 20psf but would not spend much time mid span. If you intend to sister every second then it would be a sure thing if you just used 2×4’s @12″ ctrs. as that is the longer span strength and would use less wood. The 2×4 strapping will help the rafters to work together.How much weight can be hung from a ceiling joist?Fine Homebuilding notes that 2-inch by 6-inch garage joists will support a weight of up to 50 pounds per square foot. If you overload your garage’s ceiling joists, the ceiling may appear to sag from the strain. While your 2-inch by 6-inch joists can collapse from too much weight, such a scenario is uncommon.
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