1 F Fig.l Fig. 2 Fig. 3 5. … Fig.4. Fig.5. Fig.2 is the most common section for spans between 125and 175 feet. This section is composed of two built-up channels,one cover plate,and lattice bars. The built-up channel consists ofa web plate and two angles,the lower anglesbeing much heavier thanthe upper ones, The purpose of…
