Chapter 21 Roof Plan Layout

Links for Chapter 21 Lines and Symbols Materials Drawing Roof Plans

Lines and Symbols Roof Shape - Steeper pitch means a smaller overhang Use a solid, bold line for changes in roof shape Lines representing walls are thin and dashed

Lines and Symbols Hip is a line that is drawn to represent the exterior intersection between two roof planes An interior corner is called a valley

Lines and Symbols A Dutch hip roof is drawn with a gable wall Typically 48” to 72” from exterior wall Partial sections may need to be drawn if roof is complicated

Lines and Symbols Bay windows require special consideration Square walls of the bay Lay out ridge line Extend lines for roof overhang

Materials Structural material is represented with a thin line showing the proper direction and span

Materials Nonstructural material (vents, skylights, chimneys, and downspouts) are locally noted

Materials Chimney Skylight Metal ones are represented with a 14” circle Masonry ones are 16” square Skylight Connected to the ceiling with a chase or well Allow extra light into rooms

Materials Gutters and Downspouts Used to remove water from rain off the roof Diverters are used if there is not a lot of rainfall during the year Represented with a 3” square or circle “H” is for the high side and “L” is for the low side of the gutter

Dimensions Very few dimensions are required Only overhangs and openings are dimensioned

Drawing Roof Plans Draw perimeter walls and supports Draw overhang limits 1’-0” for gable end walls 2’-0” for eaves Draw ridges, hips, and valleys Insert nonstructural materials

Drawing Roof Plans Add dimensions for overhangs and skylights Label all materials using local and general notes, title, and scale Check the drawing for completeness and quality

Drawing Roof Plans

Drawing Hip Roof Plans

Drawing Dutch Hip Roof Plans