List of top Design of Steel Structures Questions

Consider the fillet-welded lap joint shown in the figure (not to scale). The length of the weld shown is the effective length. The welded surfaces meet at right angle. The weld size is 8 mm, and the permissible stress in the weld is 120 MPa. What is the safe load $P$ (in kN, rounded off to one decimal place) that can be transmitted by this welded joint? 

Consider the horizontal axis passing through the centroid of the steel beam cross-section shown (a symmetric "plus" of arm width $b$). What is the shape factor (rounded off to one decimal place) for the cross-section?

Two plates are connected by fillet welds of size $10$ mm and subjected to tension $P=275$ kN (factored). Plate thickness $=12$ mm. Steel: $f_y=250$ MPa, $f_u=410$ MPa. Workshop welding with partial safety factor. As per IS 800:2007 (Limit State), what is the minimum length (in mm, rounded off to the nearest higher multiple of $5$ mm) required of each weld to transmit $P$?} 

Consider the fillet-welded lap joint shown in the figure (not to scale). The length of the weld shown is the effective length. The welded surfaces meet at right angle. The weld size is 8 mm, and the permissible stress in the weld is 120 MPa. What is the safe load $P$ (in kN, rounded off to one decimal place) that can be transmitted by this welded joint?