Invention Grant
US09109392B1 Method of construction of an overhead door 有权
高架门的施工方法

Method of construction of an overhead door
Abstract:
An overhead door frame apparatus having a plurality of elongated structural C-channel members. At least one of the members has a tube secured within and perpendicular to the first member and having a flat plate attached to an outside of the tube. At least an adjacent C-channel member of the plurality of members having a closed end. At least one fastener passes through the flat plate and through the tube of the first member and through the adjacent member.
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