Limträstomme till hallbyggnader : Utformning och dimensionering av momentstyva ramhörn och 3D-modell framtagning

Sammanfattning: Industrial buildings are increasing all over Sweden. Farmers are building new modern facilities and the government chooses to build new halls to invest i youth sports. Glulam is the most common framework but there are limitations because of the transport. Therefore, there is a need to develop new solutions to increase the use of glulam. The maximum torque in the eaves was found in the frame with a roof pitch of 18 degrees and a wingspan of 25 meters. Using hand calculations according to Eurocode and comparison with the computer software StatCon, the maximum torque, shear force and utilization rate is calculated. Based on the maximum torque, of 973,86 kNm (calculated as 1000 kNm), the maximum compressive force is found in the eaves storage. The area is determined to 0.116m2 and the eaves are formed with 7 lamellae glued to the inside of the frame to relocate the support surface so that cutting of the laminated timber should be as simple as possible. The relocation of the storage is also needed for the required number of WR-T screws to fit on top of the frame. The screws are dimensioned according to previously calculated traction force in the eaves and to the transmission between the screws and the glulam. The transmission forces were found in a product brochure by SFS intec. Two different screw sizes is tested and deployed by distance according to Eurocode. -          WR-T-9x400                  Number: 332 pieces/frame   Cost: 15 897 skr/frame -          WR-T-13x700               Number: 136 pieces/frame   Cost: 22 927 skr/frame Calculations on the new attachment method show that it is possible to construct moment resisting eaves. In an economic comparison between the screws, it appears that WR-T-9x400 was the cheapest regardless of the length or span on the chosen building. The design of the glulam frame system in 3D is based on the calculations and definitions. The models are developed in the software Revit in stages according to the desired dimensions and local conditions in order to show the client at the tender negotiations.