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Mastering Roof Plan Layout: Design and Components

Learn the essentials of creating a roof plan layout for structures, covering design elements, structural & nonstructural materials, dimensions, annotations, gable & hip roof planning. Helpful for drafters and architects.

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Mastering Roof Plan Layout: Design and Components

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  1. Chapter 23 Roof Plan Layout

  2. Introduction • Preliminary roof plan • Coordinates key design elements (e.g., floor, roof, and elevations, and elevations) • Roof plan • Design is considered early in design process of a structure • Completed once design is finalized • Drafter must be familiar with lines and symbols

  3. Representing Roof Plan Components • Steps to complete a roof plan includes: • Representing roof shape • Representing nonstructural materials • Dimensioning major components • Providing text to explain required equipment

  4. Representing Roof Plan Components (cont’d.) • Representing basic gable shapes • Varied ridge heights • Bay projections parallel to the ridge • Bay projections perpendicular to the ridge • Roof intersections with varied wall heights

  5. Representing Roof Plan Components (cont’d.) • Representing hip and Dutch hip roofs • Hip or valley passes through the corner of two intersecting walls • A hip or valley is represented using an angle equal to half the intersecting wall angle • Three lines represent intersections of hips, valleys, ridges, and overhangs • Overhang line of a Dutch hip roof intersects hip lines

  6. Representing Structural Materials • Plan type affects the method used to show structural material

  7. Representing Nonstructural Material • Nonstructural materials shown on roof plan: • Vents • Chimneys • Skylights • Solar panels • Diverters • Cant strips • Slope indicators • Downspouts

  8. Dimensions • Roof plan requires few dimensions • Overhangs and openings • If trusses are used, openings must be located with modular dimensions • Providing a dimension extending from an exterior wall outer edge to the opening center is the best way to locate roof openings

  9. Dimensions (cont’d.)

  10. Annotation • Notes on the roof plan can be divided into: • General notes • Vent notes • Sheathing information • Roof covering and pitch • Local notes • Skylight type, size, and material • Chimney caps, cant strips, and saddles • Solar panel type and size

  11. Drawing Gable Roof Plans • Refer to the text for complete instructions

  12. Drawing Hip Roof Plans • Refer to the text for complete instructions

  13. Drawing Dutch Hip Roof Plans • Refer to the text for complete instructions

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