3. A Channel section is connected to a 10mm gusset plate with 20mm- diameter bolts as shown in the figure. The connecting member is subjected to dead load and live load only. The pitch distance, s=60mm (c.t.c. horizontal bolt spacing), gage distance, g-75mm (c.t.c. vertical bolt spacing) and edge distance, e for the channel and gusset plate are 65mm and 70mm respectively. Considering the following limit states, calculate the total service load capacity if the live-to-dead load ratio is 2.5. The steel is A572 Grade 50 for both members. a. GSY b. NSF c. BSR 000 Channel Pu "A" Channel Section 0 1 2 3 4 5 6 7 8 9 C 9x20 C 9x13.4 C 9x15 C 8x18.75 C 8x13.75 C 8x11.5 C 7x14.75 C 7x12.25 C 7x9.8 C 6x13

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A: Handmade drawing are attached for better understanding.

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Connections

In steel structures, connections are the members that join two or more steel members. The connections are the most important members of any steel structure, and hence, they are designed more carefully. The majority of the construction cost of steel structures is incurred due to the connections. The design of connections is done as per the recommendations and specifications of the American Institute of Steel Construction (AISC).