Table Notes

1. Calculated properties are based upon AISI S100-07, North American Specification for the Design of Cold-Formed Steel Structural Members.
2. Allowable deflection limit is L/360.
3. Allowable capacities have not been modified for wind or earthquake loading.
4. Headers are made from two“boxed”or back-to-back“I” members.
5. theAllowablevalue ofmoment,the singleshearmember.and web crippling capacities are based upon twice the capacity of a single member.The moment of inertia is based upon twice.
6. Minimum bearing length for web crippling = 1-inch.
7. Capacities are calculated for unpunched members only.
8. Members are assumed to be adequately braced for bending.
9. Allowable loads are for simply supported headers with uniform bending loads only.
10. Where allowable loads are followed by“e”, web stiffeners are required at each support