Project 1 - Design a simple double cleat angle shear connection

Design a simple double cleat angle shear connection to connect (ISMB 500) secondary beam with a primary beam (ISMB 600)  in a mezzanine deck of a building to transfer factored shear force of 200 kN. Consider bolt to connect angle cleat with primary as well as secondary beam. 

Do manual design and also prepare a spread sheet to design this shear beam-beam connection

The yield strength of the member (fy )= 250 MPa and ultimate strength of plate (fu) = 410 MPa.

1. Consider 4.6 grade ordinary grade bolt. 
2. Also design by considering 8.8 grade HSFG bolts.

STEPS :

• Assume diameter of bolt (16 or 20 or 24 mm)
• Assume the cleat angle to connect and accommodate the bolt assumed comfortably with proper end and edge distance.
• Calculate shear strength of bolt –double shear case (for bolts in secondary beam)
• Calculate bearing strength of bolt
• Estimate strength of bolt (minimum of shear and bearing strength)
• Calculate total number of bolts required by dividing total load by strength
• Like above calculate number of bolts for primary beam – Single shear
• Now for HSFG bolt, calculate slip resistance of HSFG bolt and estimate the strength of bolt
• PREPARE SPREADSHEET to validate the manual design.

SOLUTION : 

• The spread sheet for the same is attached below.