Narrow Parallel Flange Beams are doubly symmetric shapes, generally used as beams whose inside flange surfaces are substantially parallel. It is able to withstand higher axial load bearing capacity, section modulus and bending strength make parallel sections more efficient. 

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NPB Vs Conventional tapered Flange

• Its economical due to savings in weight

• More convenient to fabricate

• Flexibility of using a wide range of flange width and thickness

• Better quality of finished product