12 



Forked Ends 



Pins 



Filling Rings 



Diameter 

 of Rivets 



Pitch of 

 Rivets 



102. Forked ends on compression members will be permitted only when unavoidable ; 

 and, when used, a sufficiency of pin plates shall be provided to make the jaws of at least 

 twice the sectional area of the member. On box sections at least one of these pin plates 

 shall extend to the far edge of the farthest tie plate, and the remainder shall extend to 

 the far edge of the nearest tie plate, and not less than 6 inches beyond the near edge of 

 the farthest tie plate. 



103. Pins shall be long enough to insure a full bearing thereon of all the parts con- 

 nected thereby; they shall be secured, either by chambered nuts or by solid nuts pro- 

 vided with washers; and their screw ends shall be long enough to permit of burring the 

 threads. 



104. Filling rings shall be provided, where necessary to prevent lateral movement on 

 the pins of the members connected thereby. 



105. In calculating the number of rivets required the nominal diameter only, or 

 the size of the cold rivet before driving, shall be taken as effective. 



105A. Rivets shall be of sizes shown on the Railway Company's drawings or specifi- 

 cations. 



106. The minimum distance between centres of rivet holes shall be 3 diameters of 

 the rivet, but the distance preferably shall be not less than : 



inches for 1 inch rivets 



2% " " X " " 



The maximum pitch in the line of stress for members composed of plates and shapes 

 shall be : 



7 inches for 1 inch rivets 



Rivets at 

 Ends of 

 Compression 

 Members 



Flange 

 Rivets 



Rivets in 

 Wide Flange 

 Cover Plates 



5 It II -I / II II 



y* 



4 " X " " 



For angles with two gauge lines and rivets staggered, the maximum pitch in each line 

 shall be twice the amount given above. If two or more web plates are used in contact, 

 stitch rivets shall be provided to make them act as one. In compression members, 

 the stitch rivets shall be spaced not more than 24 times the thickness of the thinnest 

 plate in the direction perpendicular to the line of stress, and not more than 12 times the 

 thickness of the thinnest plate in the line of stress. In tension members, the stitch rivets 

 shall not be more than 24 times the thickness of the thinnest outer plate in either direc- 

 tion. In tension members composed of two angles in contact, a pitch of 12 inches may 

 be used for riveting the angles together. 



107. In the ends of built compression members the pitch of rivets connecting the 

 component parts of the member shall not exceed 4 times the diameter of the rivet 

 for a length equal to 1> times the maximum width of the member; except in angles 

 having 2 lines of rivets staggered, where the pitch on each line may be twice this limit 

 but not greater than that allowed for the body of the member. 



108. The number of rivets connecting the flange angles of plate girders to the web 

 plate shall be sufficient to develop the increment of flange stress transmitted to the 

 flange angles, combined with any load (including impact) which may be applied directly 

 thereto. Where the cross ties or sleepers rest upon the flange, the maximum wheel load. 

 shall be assumed to be distributed uniformly over a length of 3 feet. The maximum 

 pitch in the vertical legs of the loaded flange angles shall not exceed 4 inches on a single 

 line, or 8 inches where there are 2 lines of rivets, staggered. 



109. When two or more cover plates are used, which project 3 inches or more beyond 

 the edge of the flange angles, an extra line of rivets shall be driven along each edge, 

 spaced not more than 16 times the thickness of the thinnest plate for tension flanges, 

 and not more than 12 times the thickness of the thinnest plate for compression flanges. 



