REINFORCING CONSTRUCTION OF LAMINATED LUMBER BEAM HOLING PART

摘要

PURPOSE: To prevent degradation of mechanical strength at the holding part of a beam member by fitting a steel pipe in an opening hole penetrating through in the horizontal direction of a laminated lumber beam and adhering, vertically providing holes on the circumference of the opening hole, and tightly fastening the laminated lumber beam by inserted bolts. ;CONSTITUTION: An opening hole 1A for piping is penetrated through in the horizontal direction of a laminated lumber beam 1, and a plurality of bolt holes 1B are vertically drilled on the circumference of the opening hole. Next a steel pipe 2 spread with adhesive is inserted into the opening hole 1A, and the outer circumferential face adheres to the inner face of the opening hole 1A. Next bolts 3 are inserted through the respective bolt holes 1B, nuts 4 are fastened, and the circumference of the opening hole 1A is tightened with the four bolts 3. Simultaneously the bolts 3 adhere to the laminated lumber beam 1. Hereby, lacking of the section by drilling is compensated by fit-in of the steel pipe, and degradation of mechanical strength of the laminated lumber at the opening hole part can be prevented.;COPYRIGHT: (C)1996,JPO