TRUSS DETAILS 2 i 



templet maker for the rest. In Fig. 95 the rivet gage lines are taken 

 as the center lines. This is the most common practice, although many 

 use one leg of the angle as the center line in secondary members. The 

 latter method has the advantage of reducing the length of connection 

 plates without introducing secondary stresses that are liable to be 

 troublesome. 



The detail drawings of a transverse bent are shown in Fig. 96. 

 The common methods of attaching purlins and girts, and of making 

 lateral connections are also shown. The fan type of Fink Truss shown 

 in Fig. 96 is quite commonly used where an odd number of panels is 

 desired, and makes a very satisfactory design. The details of the end 

 connection of a 6o-ft. span truss are shown in (a), and of a 45-ft. span 

 truss with a reinforced top chord are shown in (c), Fig. 96. The 

 method of reinforcing the top chord shown (c) is the one most com- 

 monly employed where purlins are not placed at the panel points. The 

 method of making lateral connections for the lateral rods shown in (c) 

 is not good, for the reason that it brings bending stresses in a plate 

 which is already badly cut up. 



The detail drawings of a saw tooth roof bent for the Mathiessen & 

 Hegeler Zinc Works, LaSalle, 111., are shown in Fig. 97. This building 

 was erected in 1899 along the lines suggested by an experience with a 

 similar saw tooth roof building erected in 1874. The building was de- 

 signed by Mr. August Ziesing, Vice President American Bridge Co., 

 and was erected by the American Bridge Co. 



The following description is from a personal letter from Mr. Julius 

 Hegeler of the firm of Mathiessen & Hegeler, to the author in reply to 

 a request for plans: "The cast iron gutters are fastened to the pur- 

 lins and roof boards by spikes through holes in the gutters (holes are 

 not shown in the drawing) ; on account of their slope, however, hardly 

 any fastening is necessary. These gutters are so placed that the gal- 

 vanized iron down spouts are next to the posts, there being two down 

 spouts at each post. The condensation gutters are fastened to the gut- 

 ters and empty into the down spouts. Ice has never caused any trouble 

 by forming in the gutters." 



