I could be mistaken but I think NFPA fifty four addresses it as ample clearance shall be managed to allow cleaning, support and so forth. without any dimensional standards. This forum remains free to the public due to the generous assist of our Sawhorse Users and Corporate Sponsors. Their contributions https://preferred-content-languag20875.wikitron.com/1468611/smarter_home_lift_can_be_fun_for_anyone