A regular, clear, white pine 2 x 4 stud grade can support static load of about 450 pounds for a 4' span and about half that for the 8' span with the lowest fiber stress capacity of 900psi. per the safe load table in WSDD So, the short answer is, don't use the 2 x 4 for your swing, and I think a 2 x 12 would be your least 2x for the span you're
Perfor calculations for ALL species and grades of mmercially available softwood and hardwood lumber as found in the NDS 2022 Supplement. Joists and rafter spans for mmon loading nditions can be determined. A “span options” calculator allows selection of multiple species and grades for mparison purposes.
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WebGround protection mats 2’x8′ 100 T load capacity nz . ncrete SlHENAN OKAY - Load Capacity - Engineering ToolBox. Load capacity of simply supported ncrete slHENAN OKAY. Imposed loads varies from approximately 1.5 kN/m2 (153 kg/m2) in domestic buildings to approximately 1 0 kN/m2 (1053 kg/m2) in heavy industrial areas. 500 kg/m2
This load bearing capacity is often affected by degree of mpaction, moisture ntent, and soil type. A subgrade that can support a high amount of loading without excessive deformation is nsidered good.
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Backed by a lifetime limited warranty against termite infestation and rot. 2 in. x 4 in. x 8 ft. Must use Ground ntact pressure treated lumber where lumber is at risk for poor air circulation, less than six inches from the ground, or has poor or no water drainage below the structure.
a flat 2x4 has about 20% the strength as a standing one a flat 2x6 has about 7% the strength as a standing one a flat 2x8 has about 4% the strength as a standing one You can see that especially for the deeper joists you lose practically all of the strength. Share Improve this answer Follow answered Nov 22, 2016 at 16:49 Hank 13.9k 10 43 47
The distance a 2×8 can span depends on species, grade, purpose, location, loads, and several other factors. Joist spans range from 7’-1” to 16’-6 when all factors are nsidered. Most select structural (SS) and #1 grade lumber will span 12-feet or more, with SPF falling shy of that span.
Note: Deflection is limited to the span in inches divided by 360 for live load . Maximum spans are inside to inside of bearings Span (feet-inches) Span (feet-inches) Span (feet-inches) Floor Joists - 40 psf Live Load, 10 psf Dead Load, L/360 Deflection Floor Joists - 30 psf Live Load, 10 psf Dead Load, L/360 Deflection 2x12 2x6 2x8 SPF(s
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Backed by a lifetime limited warranty against termite infestation and rot. 2 in. x 8 in. x 8 ft. Must use Ground ntact pressure treated lumber where lumber is at risk for poor air circulation, less than six inches from the ground, or has poor or no water drainage below the structure.