Building Sections

2. Chapter 21 Building Sections

3. Building Sections Building sections Vertical “cuts” or “slices” through a structure Longitudinal Building Section Runs across the longest dimension of a building Transverse Building section Runs perpendicular to longitudinal building sections

4. Purpose of Building Sections • Illustrate type of construction such as foundation types, walls, and roof construction • Give vertical dimensions and provide information about size of structural components • Provide important information about materials and material sizes • Inform contractor or builder of special or unconventional construction methods or techniques • Show specific materials to be used

5. Types of Building Sections • Full building sections • Partial building sections • Wall sections • Detail sections

6. Full Building Section Information • Overall height dimensions and relationships • General building materials used • Foundation information • Special or unusual construction techniques and methods • Drawn at same scale as floor plan

7. Full Building Section

8. Partial Building Section Information • Shows part of structure in more detail • Cuts through half or more of structure, but not its entire length • Drawn at a larger scale—usually 3/8″ = 1′-0″ or larger

9. Partial Building Section

10. Wall Section Information • Cuts through only one (typically exterior) wall • Shows foundation system, wall system, roof system at one location in structure • Shows more specific detail than any other type of building section • Usually drawn at same scale as floor plan

11. Wall Section

12. Typical and Specific Sections • Typical section • Represents features or sizes that are used in many different places in structure • Specific section • Shows feature, method, or technique that is used only once

13. Specifying Building Section Location Section marks are used to indicate where sections are being taken or cut. Because of the complexity of architectural drawings cutting plane lines are generally omitted Only the arrow indicating the direction of sight of the section view is shown

14. Identifying Sections First section is labeled A–A Second section is labeled B–B Actual section drawings are labeled Section A–A, Section B–B, and so on The upper letter indicates the name of the section on the sheet The lower number refers to the sheet where the section view is drawn

15. Preparing to Draw Building Sections • Questions to be answered include: • Foundation information? • Existing grade? • Heights from finished floor to finished ceilings? • Rough openings of doors and windows? • What type of roof construction? • What kind of exterior materials? • What type of soffit?

16. CADD: Full Building Section Collect essential size information Select or create section layers Draw footing and foundation wall Locate and draw basement slab Position and draw grade line

17. CADD: Full Building Section Locate and draw floor joists, ceiling joists and wall and roof structures Use actual sizes rather than nominal sizes Add details and material hatch patterns Add dimensions and notes Add scale and title on appropriate layers Review your work

18. CADD: Full Building

19. T CADD: Detail Section (Typical)

20. T CADD: Detail Section (Typical)

21. T CADD: Detail Section (Typical)