ridgebearing

Ridge bearing refers to a bearing element placed at the apex of a structure where roof rafters, purlins, or a ridge beam meet along a ridge line. It provides a surface that supports and aligns the ridge member and transfers vertical loads to supporting posts, walls, or foundations. The bearing may be a simple timber block, a machined metal plate, or a purpose-built insert with bushings or rollers, depending on the required movement and load capacity. Some designs allow limited angular or horizontal movement to accommodate shrinkage, thermal expansion, wind uplift, or settlement without concentrating stress at a single point.

Installation and design: Typically located directly under the ridge or along the ridge line, it must be sized to carry the anticipated load and avoid crimping or point loads on the bearing surface. Fastening can involve nails, screws, bolts, or through-bolts, and padding or a sliding surface may be used to reduce friction and wear.

Materials and maintenance: Wood, steel, aluminum, or composite materials are used. In exterior applications, weatherproofing and corrosion protection are important. Regular inspection should check for wear, deformation, rot, cracking, or corrosion; damaged ridge bearings should be replaced to maintain structural integrity and alignment. Lubrication is rarely required with modern materials, but rolling or sliding bearings may need periodic servicing.