OR For supporting the travelling crane in a workshop, the brackets are fixed on steel 10M columns as shown in below figure. The maximum load that comes on the bracket is 12 kN acting vertically at a distance of 400 mm from the face of the column. The vertical face of the bracket is secured to a column by four bolts, in two rows (two in each row) at a distance of 50 mm from the lower edge of the bracket. Determine the size of the bolts if the permissible value of the tensile stress for the bolt material is 84 MPa. mu = - 400 mm 12 kN 375 mm 50 mm