Geometry conditions: Minimum distance to edge aCG,2 in LVL edge ≥ 4d = 4∙5,0 mm = 20 mm. Beam thickness 45 mm/2 = 22,5 mm → Screw size 5,0x50 mm is OK for the beam. Min. screw spacing a1 ≥ 10d = 50 mm Min. distance from the beam end a1,CG ≥ 12d = 60 mm Min. pointside penetration length of the threaded part lg ≥ 6d = 30mm, OK Tension strength of the connection R_k=n^0,9 〖 R〗_(T,k) R_(T,k)=f_(ax,k)∙d〖∙l〗_ef l_ef=l_g-d=50 mm-5 mm=45 mm R_(T,k)=10 N/mm^2 ∙5,0 mm ∙ 45 mm=2,25 kN R_d= 〖k_mod/γ_M ∙n〗^0,9 〖 ∙R〗_(T,k)=0,6/1,3∙2^0,9∙2,25 kN=1,9 kN E_(d,ULS)≤R_d→OK The axial loaded screw connection can be made with two 5,0 x 50 mm size screws/connection positioned at the middle of the edge face of the beam with 50 mm screw spacing. The screws shall not be closer than 60 mm from the beam end. 9. CALCULATION EXAMPLES OF LVL STRUCTURES k = 0,9 T,k T,k = ax,k ∙ ∙ ef ef = g − = 50 mm−5 mm = 45 mm T,k =10 m N m2 ∙ 5,0 mm ∙ 45 mm = 2,25 kN d = mod M ∙ 0,9 ∙ T,k = 0 1 , , 6 3∙ 20,9 ∙ 2,25 kN = 1,9 kN d,ULS ≤ d →OK LVL Handbook Europe 199
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