The Industrial Pub Co. · The Industrial Pub Co. · leaf 4
ded at the center. It should also be noticed that by increas-ing the length of a beam we decrease itsstrength. Hence it is said that the strengthof a beam increases inversely as its length. Fig. I. The material at the top and bottom of abeam gives it its strength, and to cut notch-es for pipe… … If a knot should be in a beam near or atthe top or bottom, the beam should be placedso that the knot will be nearest the top, asthis portion of the beam will be in com-pression, as shown in Fig. 3; the fibres ofthe wood will be pressing on the knot fromboth sides, keeping it in place. If the beamis…
Carpentry · Wood framing
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