The member that spans a window or door opening in a framed wall, chosen from the sawn lintel, flat header, lumber header, LVL header, insulated header, SIP header, plywood box header and the HDS, L, box beam and back-to-back steel headers; the host passes the length, the width across the wall, the depth and the finish.
Category: Framed Walls › Timber Frame Walls › Opening Headers
By Huu Khanh Nguyen · Updated November 14, 2026