Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 137
is twice as strong asone 6 inches wide), but in direct proportionalso to the square of the depth (that is, agirder 12 inches deep is four times as strongas one 6 inches deep). Hence, the most economical girder is one whichis deeper than it is wide, such as an 8X 12-inch stick; and the widthmay be… … Fig. 132. Buckled Girder Show-ing Too Light Construction
Architecture · Building
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