CIVL439/WOOD476 2003 Erection of Atrium Trusses Trusses with light metal gauge connectors with Glulam Rivet Failure modes Failure modes 2)Tensile failure of plate N.-on.(KpKsrK:)u 58 06 t factor for hee 3)Shear failure of plate 。5 86 1/41 065 Calculating tooth resistance Net areas for tooth resistance N=0.8(Test value)(A) d less 10 CIVL439 / WOOD476 2003 10 Erection of Atrium Trusses Steel plates fastened to PSL members with Glulam Rivets On-site bolted connection Trusses with light metal gauge connectors Failure modes (1) Teeth pulling out Nu = φ nu (KDKSFKT )JH φ = 0.6 JH is a moment factor for heel connections 1 Slope JH slope < 1 / 4 0.85 > 1 / 4 to 1 / 3 0.8 > 1 / 3 to 1 / 2.4 0.75 > 1 / 2.4 to 1 / 2.2 0.7 > 1 / 2.2 0.65 Failure modes (2) Tensile failure of plate Tr = φ tp φ = 0.6 (3) Shear failure of plate Vr = φ vp φ = 0.6 Calculating tooth resistance Nu and Ns are based on test values (N/mm2 ) listed in CCMC reports Nu = 0.8 (Test value)(Agross) or Nu = (Test value) (Anet) Where Agross is the total area covered by the truss plate, and Anet is the total area covered less the end zones as shown in the next slide Net areas for tooth resistance end distance a = max (12mm or 0.5 tooth length) edge distance e = max (6mm or 0.25 tooth length)