Test: Tension Members - 1 - Civil Engineering (CE) MCQ

Carbon has the maximum influence on the mechanical properties of steel. Iron-carbon alloys containing up to 2 per cent carbon are called carbon steel while those having more than 2% are called cast steel. With increase in carbon the tensile strength of steel increases but the ductility falls.

Effective flange area =  
Net area of the flange = 

For mild steel
(i) Proportional limit (190 - 220) N/mm²
(ii) Yield strength (230 - 250) N/mm²
(iii) Ultimate strength (410 - 530) N/mm²
(iv) Fracture strength (250 - 300) N/mm²
(v) Elongation at fracture (23 - 35)% Thus the order of elongation is 10%

Base plates are provided to distribute the load of a column on greater area.

Permissible values
Axial tensile stress = 0.6f_y
Bearing stress = 0.75f_y
Maximum shear stress = 0.45f_y
Stress in slab base = 185 MPa for all type of steels.

Strength of member = allowable tensile stress x
Net area of the angle
Net area = Gross Area - deduction for holes.

Maximum allowable tensile strength

Net sectional area of the plate is given by,
A_net = (B - nd) x t
= [300-1 x (18 + 1.5)] x 10
= 2805 mm²

The net area of the tension member is given by, 

The angle section is connected by one leg only.