1. Chapter 42 Building Codes and Commercial Design

2. Introduction Commercial drafting depends more on building codes –This means working with the International Building Code or a local code based on IBC You must be able to properly use the code governing your area

3. Exploring Building Codes International Building Code (IBC) –Published by the International Code Council (ICC) –Merger between: Uniform Building Code (UBC) National Building Code (NBC) Building Officials and Code Administrators International (BOCA) Standard Building Code (SBC)

4. Exploring Building Codes (cont’d.) International Building Code (cont’d) –Part of a family of codes Structural Plumbing Mechanical Fire Residential –Several other International Codes published by the ICC (e.g., fuel gas, sewage disposal, etc.)

5. Exploring Building Codes (cont’d.) Building codes influence every aspect of a construction project –Code book should be available and referred to frequently Check with building department to determine the code for drafting project

6. Exploring Building Codes (cont’d.) Exploring the IBC –Each code consists of related books to regulate: Design and structural Electrical and energy Fire Mechanical Plumbing Zoning –Construction types are numbered from I to V

7. Exploring Building Codes (cont’d.) Exploring the IBC (cont’d.) –Additional considerations Safety requirements Building systems Building materials

8. Determining Design Categories Occupancy groups –Specifies by whom or how the structure will be used Ten classifications, broken into sub classifications Group R occupancy categories considerations

10. Design Categories (cont’d.) Type of construction –Five general types of construction Represented by the Roman numerals I through V Building area –Basic square-foot sizes May be altered depending on construction techniques

12. Design Categories (cont’d.) Determining height –Occupancy and type of construction will determine maximum height Building location and size –Impacted by zoning and the structures use Increasing space between buildings lessens chance of additional fire damage and provides greater firefighting equipment access

13. Design Categories (cont’d.) Increasing the allowable floor area –Wood frames cannot be as large or tall as those built of noncombustible materials Fire protected structural members may be larger and taller Occupancy load –Determined by a ratio of room area to code specified area per person

15. Design Categories (cont’d.) Exits –Exit paths Mostly determined by number of occupants –Determining exits Refer to text for calculations –Exit locations If more than one exit is required, IBC requires at least two exits be separated by one-half of the diagonal of the area served

16. Design Categories (cont’d.) Accessibility requirements for type R occupancies –Type of living units based on level of accessibility provided Type A or B

17. Design Categories (cont’d.) Accessibility requirements for type R occupancies –Additional considerations: Accessible routes Operating controls Doorways Kitchens Toilet and bathing facilities

20. Using the Codes Drafter must be aware of classifications –Many problems will need the code to solve Requires knowledge of basic code limitations –Practice using tables in the text and similar tables of the code that govern your area