Structural Carpentry: Erects minor structures and modifies existing structures by determining dimensions, materials, and locations of doors and windows; cuts, squares, mortises, levels, and secures sills; installs joists, studs, plates, and braces; and calculates, lays out, cuts, and installs rafters using framing squares and rafter tables to ensure proper alignment, strength, and structural integrity. Maintenance and Alterations: Performs maintenance, repair, and alteration work on siding, roofs, doors, windows, partitions, and existing structures; constructs additions, relocates doors and partitions, and measures, cuts, assembles, and installs shelving, bulletin boards, rough cabinets, signs, scaffolding, and other building components.