A 2x4 can hold up to 1,000 pounds when standing vertically, such as when it functions as a stud.
When laying horizontally, it can hold up to 40 pounds per linear foot.
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When standing vertically, such as when it functions as a stud, a 2×4 can hold about 1,000 pounds. A 2×4 can hold up to 40 pounds or 300 pounds when laying on its edge without sagging when laying horizontally.
How Much Weight Can A 2X4 Hold? - Plasticine House
A 2×4 can hold around 1000 pounds vertically because the weight is not against the grain. Horizontally, a 2×4 can hold a uniform load somewhere between 20 and 40 pounds per linear foot depending on many factors like species, grade, load, and span.
How Much Weight Can A 2x4 Hold? - Weekend Builds
It is common practice in residential construction to use multiple pieces of 2 x lumber connected together (sometimes referred to as, “ stud packs”) to build interior columns. Timberlands Trees are…
The Built-Up Column Conundrum :: Weyerhaeuser