RULES FOR SHOP DRAWINGS. 



891 



tnnpli-t m.ikt T. The drawings should indicate the number and arrangement of the rivets in each 

 i ( mini linn, as well as the maximum, the usual and the minimum rivet pitch allowed. Sketch 

 details of the joint which was completely detailed in Fig. I are shown in Fig. 3, and the outline 

 details of a roof truss by the second method arc shown in Fig. 4. 





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FIG. 2. JOINT OF ROOF TRUSS COMPLETELY DETAILED. 

 (Section of Shop Details of Roof Truss.) 



Members may be detailed in the position which they are to occupy, or they may be detailed 

 separately. For riveted trusses and riveted members the entire truss or member should be 

 detailed in position. The detail shop plans for a riveted brace are shown in Fig. 5. The field 

 rivets are shown by black and the shop rivets by open circles. The center lines are indicated by 

 dotted lines. Light full black lines are commonly used for dimension lines, while red dimension 

 lines are sometimes used but do not make as good blue prints as black lines. 



RULES FOR SHOP DRAWINGS. The following rules are essentially those in use by 

 the best bridge and structural shops. 



Size of Sheet. The standard size of sheet shall be 24 X 36 in. with two border lines i and I in. 

 from the edge respectively, see Fig. 6. Sheets 18 X 24 in. with two border lines } and I in. 



