Welded Connection Introduction | Design of Steel Structures

WELDED CONNECTIONS Advantages 1. Welded structures are lighter due to absence of gusset plates, connecting angle, etc. 2. Absence of making holes for bolts, etc. 3. More adoptable and 100% efficiency can be achieved 4. Good aesthetic appearance 5. Less noise 6. Alterations in connections can be easily made 7. No problem of mismatching of holes. Disadvantages 1. Needs skilled workers 2. Not good to resist fatigue stresses 3. Likely to get distorted due to uneven heating and cooling 4. Inspection of joints is difficult and expensive 5. Proper welding in the field is difficult Types of Welded Joints * Butt welds Square, V, U, J welds, may be single or double. * Fillet welds Approximately triangular connections when the cross section of fillet weld is isoceles triangle with face at 45°, it is known as a standard fillet weld. In this case t = = 0.7s where s is size and t is throat thickness. * Slot weld and plug weld To make slot weld a circular hole is made in one plate, kept on another pl...