Kekuatan sambungan baut double shear berpelat sisi baja pada kayu Sengon, Bintangur dan Kapur menurut berbagai sesaran

Abstract

INTRODUCTION : Wood as raw material needs continue to increase for various purposes. Similarly, for component building materials or construction materials. As a construction materials, wood has been known to the public long before the public to use concrete or steel. In use as building construction materials, wood should be able to withstand various kinds of expenses in the period planned and have sufficient durability and has a cross-sectional size or length of span in accordance with the planning. Cross-sectional size or long span timber in accordance with the plans for building construction is very difficult to obtain. This is because of the limited size of available timber in the market so it needs a connection. MATERIAL AND METHOD : The main material used is wood sorts Sengon (Paraserianthes falcataria (L). Nielsen), Bintangur (Calophyllum inophyllum L.) and Kapur (Dryobalanops sp.), bolts and steel plates. Wood used as a mechanical connection that unites steel plate with wood screws that penetrate the system using the plate-wood-plate which is the tightened with a nut for strong connection strength is based on ASTM D5652-95 with a direction perpendicular to the bolt load. Other properties tested were water content, density and maximum compressive strength parallel to grain. Tests physical properties following the ASTM D143-94, while the mechanical properties following the BS-373 1957. RESULT : Double-shear strength bolt connection between the wood with steel plates in general are influenced by density of wood. The higher value density then the value of the power connection (which is expressed with the total load) and the value of load per bolt will be higher as well. Total expenses will increase with the number of bolts except from 6 to 8 pieces,while the load per bolt is not affected by the number of bolts. Total load and load per bolt tends to increase with increasing bolt diameter from 6.4 mm to 7.9 mm,but decreases when the diameter increased to 9.4 mm bolts.