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DOUBLE MEMBER HEADER TABLE GENERAL NOTES
1. Deflection limit is L/360.
2. Allowable loads have not been modified for wind or earthquake loading.
3. Headers are made from two "boxed" or back to back members.
4. Bearing length for web crippling = 1" minimum.
5. Allowable moment, shear and web crippling are based on twice the capacity of a single member and the moment of inertia, twice the value of a single member.
6. Values are for unpunched members.
7. Members are assumed adequately braced for bending.
8. Allowable loads are for simply supported headers with uniform bending loads only.