268 TECHNICAL INFORMATION ADMISIBLE RESISTANCES AND LOADS FOR SUPPORT CHANNELS CALCULATION EXAMPLE *Values calculated without surpassing admissible tension σadm = 16 N/mm2 nor a maximum arrow of L/200. For cases not included in these calculations, consult with INDEX Fixing Systems’ Technical Department. L= 500 CASE 1 CASE 3 CASE 2 CASE 2 CASE 4 Punctual load in the centre Slotted channel GPG3840 with length between supports (L) of 500 mm., with 2 centered punctual loads (case 2) For the L=500 value and for the support system GPG3840, we get a resistance value of 2600 N ≈ 260 kg Three punctual loads in L/4 Two punctual loads in L/3 Uniform load L/3 L/3 L/3 Strut channel 28 / 30
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