Determine the effective net areas of the sections shown by using the U values given...

Determine the effective net areas of the sections shown by using the U values given in Table 3.2 of this chapter.

An MC12 × 45 is connected through its web with 3 gage lines of 7/8-in Ø bolts. The gage lines are 3 in on center and the bolts are spaced 3 in on center along the gage line. If the center row of bolts is staggered with respect to the outer row, determine the effective net cross-sectional area of the channel. Assume there are four bolts in each line.