Manufacture of building platforms to the order and specification of others; manufacture of transit platforms to the order and specification of others; manufacture of raised building walkways to the order and specification of others; manufacture of raised platform components to the order and specification of others, namely, frames not of metal for building, non-metal reinforcement materials for building, non-metal decking, non-metal stairs, staircases, not of metal, beams, not of metal, non-me...