Require vocational training and/or experience in trades including carpentry, electrical, plumbing, painting, and/or heating and air conditioning, knowledge of its practices, procedures, materials and tools, skills in a variety of trades, and an ability to plan and layout job assignments. Repair and/or install windows, doors, partitions, coiling components, floor tiles, cove base, stair treads, wall coverings, and roofs, carpet squares, handrails, and shelves.