Framing
Cripple Stud
Short studs installed above a header or below a sill to maintain the standard stud spacing and provide nailing for sheathing and interior finishes.
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In the Field
Cripples above a header transfer loads from above to the header and maintain sheathing nailing. Cripples below a window sill provide backing. Space them at the same OC spacing as full-height studs.
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Rule of Thumb
Cripples above a header should be spaced at the same 16 or 24 inch OC spacing as the wall studs, aligned with the studs below if possible.