Transactions . ded to resist the shearing-stresses, leave in the middle ofthe beam a length equal to one-quarter of the span free fromfastenings of any kind (unless small bolts), then space the keysat equal distances throughout the remaining part of the beam.The writer believes that, when practicable, it is better to use anumber of small keys rather than a few large ones, since thebeam is less weakened by the key-slots, and in proportion as * 800 for oak keys. THE EFFICIENCY OF BUILT-UP WOODEN BEAMS. 809 the keys are more numerous their action approaches morenearly to the conditions found in a

GLIX-115-2AXC2G8

Transactions . ded to resist the shearing-stresses, leave in the middle ofthe beam a length equal to one-quarter of the span free fromfastenings of any kind (unless small bolts), then space the keysat equal distances throughout the remaining part of the beam.The writer believes that, when practicable, it is better to use anumber of small keys rather than a few large ones, since thebeam is less weakened by the key-slots, and in proportion as * 800 for oak keys. THE EFFICIENCY OF BUILT-UP WOODEN BEAMS. 809 the keys are more numerous their action approaches morenearly to the conditions found in a
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Transactions . ded to resist the shearing-stresses, leave in the middle ofthe beam a length equal to one-quarter of the span free fromfastenings of any kind (unless small bolts), then space the keysat equal distances throughout the remaining part of the beam.The writer believes that, when practicable, it is better to use anumber of small keys rather than a few large ones, since thebeam is less weakened by the key-slots, and in proportion as * 800 for oak keys. THE EFFICIENCY OF BUILT-UP WOODEN BEAMS. 809 the keys are more numerous their action approaches morenearly to the conditions found in a

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