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SmartLVL 15 Design Guide - Tilling Timber

SmartLVL 15 Design Guide - Tilling Timber

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SmartSplay <strong>15</strong> COUNTER BEAMS - SUPPORTING HANGINGBEAMS - AS 4055 WIND CLASSIFICATION N1, N2, & N3Hanging Beam<strong>SmartLVL</strong> Roof VoidCounter BeamEXAMPLE:single spancounter beam span = 5500total of hanging beam span L1 + L2 = 6400 mmceiling load width CLW = 6400/2 = 3200 mmWAL2 = HangingL1 = HangingBeam Span 1Ceiling Load Width=(L1+L2)/2Beam Span 2Average hanging beam span/ceiling load width(mm)Member size DxB (mm)Counter Beam SpanEnter table at 3600 mm load width column and read downto span equal to or greater than 5500 mmADOPTSmartSplay <strong>15</strong> Roof-void beam300 x 422400 3000 3600 4200 4800 5400 6000Maximum counter beam span<strong>15</strong>0x42 3800 3500 3300 3200 3000 2900 2800170x42 4300 4000 3800 3600 3400 3300 3200200x42 4900 4700 4400 4200 4000 3900 3700240x42 5600 5300 5100 4900 4700 4600 4500300x42 6600 6300 6000 5800 5600 5500 5300<strong>15</strong>0x58 4200 3900 3700 3500 3400 3200 3100170x58 4700 4500 4200 4000 3800 3700 3500200x58 5300 5000 4800 4600 4500 4300 4200240x58 6100 5800 5500 5300 5100 5000 4900300x58 6600 6600 6500 6300 6100 5900 5800Only360x58 6600 6600 6600 6600 6600 6600 6600300x75 6600 6600 6600 6600 6500 6300 6100NOTESRoof void chamfer on one end onlyi. Minimum end bearing length = 70 mmii. Top edge of strutting beams with D/B >3 shall be laterally restrained as per details on page 6<strong>SmartLVL</strong> <strong>15</strong> <strong>Design</strong> <strong>Guide</strong> (WA Supplement) 86

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