them equally or to arrange them in groups ofequal spaces. When so arranged, the spaces are dimensioned in groups instead of singly, thus, 5@3=i-3 Matehial for One Truss Maak OEiCRIPTION Lensth 4- T.C. ^ J£^i> i l6-2^i 2 B.C ^^i-erxi- z9-a 2 Dl iS2-k2i£ 3-9~± 2 D2 /i2x£-x^- 7-7it 4- 81 PI. sf^ i-… … Fig. 19. 61 means that there are five spaces three inches long and that they total a length of one foot and three inches. SeePlate Girder, Fig. i8. In case of a double row of staggered rivets, they are often specified as follows. 7 alt. @ 4 =2-^. 169. Structural steel shapes are designated as…
Mechanical drawing · Lettering
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