358 CAMBRIA STEEL. 



GENERAL RULES FOR RIVET SPACING FOR 

 BRIDGE AND STRUCTURAL WORK. 



The pitch or distance from center to center of rivets should not 

 be less than 3 diameters of the rivet, preferably not less than 3 

 inches for Jsi inch rivets, 2X inches for ^ inch rivets, 2 inches 

 for }i inch rivets and 1 ^ inches for X inch rivets. 



At the ends of compression members the pitch should not 

 exceed 4 diameters of the rivet for a length equal to \% times 

 the maximum width of the member. 



Where two or more plates are in contact, rivets spaced not 

 more than 12 inches in either direction shall be used to hold them 

 together. 



For members composed of plates and shapes the pitch in the 

 direction of the line of stress should not exceed 6 inches for "J/i and 

 y inch rivets, 4^ inches for ^i inch rivets and 4 inches for ]/2 inch 

 rivets. For angles with two gauge lines in built-up members, 

 rivets staggered, the maximum pitch in each line may be twice 

 these distances. 



The distance between the sheared edge of any piece and the 

 center of the rivet hole should not be less than \]/2 inches for 

 ^ inch rivets, 1^ inches for ^ inch rivets, lyi inches for ^ inch 

 rivets and 1 inch for y inch rivets; for a rolled edge, these 

 distances may be 1>^, l^i, 1 and ^ inches, respectively; when 

 practicable it should, for all sizes, be at least 2 diameters of the 

 rivet and should not exceed 8 times the thickness of the plate. 



Minimum spacing is generally used in pin plates, at ends of 

 columns, girders, etc., etc. 



. In figuring clearance of rivets for special cases, allow $4 inch 

 in addition to diameter of head. 



