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D1.L.1.1.2 Tension

Allowable tensile stress on the Net section is calculated as (0.60×Fy ), but not more than (0.5×Fu ) on the Net area.

The Net Area (An) shall be determined in accordance with the clause XVII-2283 of NF-3000 1974, and the NSF parameter can be utilized for that. 

The provisions for Pin-connected and Threaded tensile member are not implemented in STAAD.Pro.