The smaller lap length of the steel bar lap joint between two welded mesh ends should not be less than 1.3 times the smaller anchorage length la, and should not be less than 200mm. In the lap area, each welded steel bar mesh should have at least one transverse steel bar, and the spacing between the two steel bar mesh pieces and the outer transverse steel bar should not be less than 50mm.
When one of the two steel mesh sheets in the overlapping area has no transverse steel bars, the smaller overlapping length of the ribbed steel mesh sheet should be 1.3 times the smaller anchorage length la and should not be less than 300mm. When the diameter d of the longitudinally stressed steel bars in the overlap area is ≥ 10mm, the overlap length should be increased by 5d.
Before laying the steel mesh, a plan for arranging the steel mesh should be formulated. During the laying of the steel mesh, professional personnel should be equipped according to the actual needs of the site to provide on-site guidance. For the welded mesh that needs to be anchored into the beam at both ends, when the longitudinal steel bars of the steel mesh are thin, the bending deformation function of the steel mesh can be utilized. First, bend the middle of the welded mesh upwards so that both ends can be penetrated into the beam successively, and then flatten the steel mesh.
When the steel bars are too thick to bend the welded mesh, 1-2 fewer steel bars can be welded at the ends of the welded mesh, and then the two ends can be pierced into the beam one by one. The reduced horizontal steel bars and additional steel bars should be tied with steel wires at each node where they are connected to the welded mesh using on-site binding methods with straight bars.
