Design Example - Building Construction

Loads

• type: dead, live, soil, flood, wind, snow, rain, ice, seismic, blast, and their combinations
• direction: vertical, horizontal
• duration: permanent, transient

live loads Building Classification Minimum Uniformly  Distributed Load (psf) Libraries        reading rooms 60   book stacks 150 Offices     office spaces 80   lobbies 100 Residential     private dwellings 40   apartment units, hotel rooms 40   public rooms 100   corridors 60 Schools     classrooms 40   corridors 100 Sidewalks and Vehicular Drives 250 Stairs, Fire Escapes, Exitways 100

lumber Nominal Size Actual Size 2 X 4 1 1/2"  X  3 1/2" 2 X 6 1 1/2"  X  5 1/2" 2 X 8 1 1/2"  X  7 1/4" 2 X 10 1 1/2"  X  9 1/4" 2 X 12   1 1/2"  X  11 1/4" deflection limits Structural Component Live Load Only Live Load + Dead Load Roof Beams          industrial L/180 L/120   commercial and institutional            without plaster ceiling L/240 L/180     with plaster ceiling L/360 L/240 Floor Beams L/360 L/240 Highway Bridge Stringers L/300   Railway Bridge Stringers L/300 to L/400

Etc.

• wood properties
  • Wood Handbook Chapter 4 - Mechanical Properties of Wood
  • Wood Handbook Chapter 6 - Lumber Stress Grades and Design Properties
• environmental conditions
• construction systems: green, traditional, foreign
• construction details
• equipment
• cost estimating
• scheduling
• design guides
  • National Design Specification for Wood Construction
  • A Primer on ASD and LRFD Design Methods (bottom)
  • LRFD Primer

Plans and Models

Construction Steps

clearing, foundation, utilities
framing, sheathing, roofing
wiring, insulation, ductwork
drywall, paint, flooring, trim, fixtures
landscape, paving
steel + wood