Just currently in discussions with my builder regarding the bowing of a lintel above our 3600mm stacker door in the alfresco area. The builder has used a 6mm lintel instead of a 10mm lintel (150 x 100 x 10 as per engineering plans), which has now created the bowing. Build is finished, and we are in maintenance period at present.
The builder's engineer has come back and advised;
"the maximum 6mm deflection above the rear 3.60 metres wide slide door does not undermine the structural integrity of the angle.
The maximum allowable deflection is determined as span divided by 500 which is approximately 7-8.0mm."
I'm of the belief that the deflection is at least 9mm.
Is anyone able to advise whether the engineer allowable deflection statement meets tolerances under the standards? I am having difficulty locating this tolerance allowance.
Thanks for any assistance.