Crossarms and Brackets. H-1 Wood crossarms supporting the crossing span should be of fir, treated yellow pine or other suitable timber. They should have a nominal cross-section of not less than the values given in Table H-1. Table H-1 Recommended Dimensions of Wood Crossarms Number Nominal Length Nominal Cross-section of Wires (Feet) (Inches) (Inches) * Where crossarms are bored for 1/2-in. steel pins, 3-in. by 4-1/4 in. crossarms may be used. ** Permitted in medium and light loading districts only.
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Sources: Right of Way Operating Agreement (Pathnet Telecommunications Inc), Right of Way Operating Agreement (Pathnet Telecommunications Inc)