TRENDS OF LOAD BEARING CAPACITY OF NAILED AND SCREWED JOINTS IN SHORTAND LONG-TIME EXPERIMENTS USING END GRAIN CONNECTIONS WITH GUSSET PLATES AND VENEER PLYWOOD BOARDS

Recently, the board bearing capacity of nails in end grain steel plati ng of laminated wooden beams was extensively studied using shearing lo ad, withdrawal load and a combined loading. This article describes add itional tentative experiments revealing some trends of the load bearin g capacity of end grain joint under shearing laod. The following conne ctions were studied: veneer plywood boards connected to laminated beam s by nails (with and without rough-drilling) and by screws (rough-dril ling), steel plates connected to wood by nails, and steel plates conne cted to laminated beams by screws. Furtheron, nailed steel plated side grain joints of laminated beams were tested for comparison. Additiona lly, long time experiments with nailed steel plated joints of laminate d beams in end grain and in side grain connection were performed.