• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

1605.3.1 Basic Load Combinations

2014 FBC - Building, 5th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations
JUMP TO FULL CODE CHAPTER

Where allowable stress design (working stress design), as permitted by this code, is used, structures and portions thereof shall resist the most critical effects resulting from the following combinations of loads:

D + F(Equation 16-8)
D + H + F + L (Equation 16-9)
D + H + F + (Lr or S or R)(Equation 16-10)
D + H + F+ 0.75(L) + 0.75(Lr or S or R)(Equation 16-11)
D + H + F + (0.6W or 0.7E)(Equation 16-12)
D + H + F + 0.75(0.6W) + 0.75L + 0.75(Lr or S or R)(Equation 16-13)
D + H + F + 0.75 (0.7 E) + 0.75 L + 0.75 S(Equation 16-14)
0.6D + 0.6W+H(Equation 16-15)
0.6(D + F) + 0.7E+H(Equation 16-16)
Exceptions:
  1. Crane hook loads need not be combined with roof live load or with more than three-fourths of the snow load or one-half of the wind load.
  2. Flat roof snow loads of 30 psf (1.44 kN/m2) or less and roof live loads of 30 psf (1.44 kN/m2) or less need not be combined with seismic loads. Where flat roof snow loads exceed 30 psf (1.44 kN/m2), 20 percent shall be combined with seismic loads.
  3. Where the effect of H resists the primary variable load effect, a load factor of 0.6 shall be included with H where H is permanent and H shall be set to zero for all other conditions.
  4. In Equation 16-15, the wind load, W, is permitted to be reduced in accordance with Exception 2 of Section 2.4.1 of ASCE 7.
  5. In Equation 16-16, 0.6 D is permitted to be increased to 0.9 D for the design of special reinforced masonry shear walls complying with Chapter 21.

1605.3.1.1 Stress Increases

Increases in allowable stresses specified in the appropriate material chapter or the referenced standards shall not be used with the load combinations of Section 1605.3.1, except that increases shall be permitted in accordance with Chapter 23.

1605.3.1.2 Other Loads

Where flood loads, Fa, are to be considered in design, the load combinations of Section 2.4.2 of ASCE 7 shall be used. Where self-straining loads, T, are considered in design, their structural effects in combination with other loads shall be determined in accordance with Section 2.4.4 of ASCE 7. Where an ice-sensitive structure is subjected to loads due to atmospheric icing, the load combinations of Section 2.4.3 of ASCE 7 shall be considered.

Related Code Sections


1605.3.1 Structural Design, Basic Load Combinations
critical effects resulting from the following combinations of loads: (Equation 16-8) (Equation 16-9) (Equation 16-10 ...
2017 FBC - Building, 6th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations
1605.3.1 Structural Design, Basic Load Combinations
critical effects resulting from the following combinations of loads: D + F (Equation 16-8) D + H + F + L (Equation 16-9 ...
2014 FBC - Building, 5th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations
1605.3.1 Structural Design, Basic Load Combinations
critical effects resulting from the following combinations of loads: (Equation 16-8) (Equation 16-9) (Equation 16-10 ...
2020 FBC - Building, 7th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations
1605.3.1.2 Structural Design, Other Loads
Where flood loads, F a , are to be considered in design, the load combinations of Section 2.4.2 of ASCE 7 shall be used. Where self-straining loads ...
2020 FBC - Building, 7th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations > 1605.3.1.2 Other Loads
1605.3.1.1 Structural Design, Stress Increases
Increases in allowable stresses specified in the appropriate material chapter or the referenced standards shall not be used with the load ...
2017 FBC - Building, 6th edition > 16 Structural Design > 1605 Load Combinations > 1605.3 Load Combinations Using Allowable Stress Design > 1605.3.1 Basic Load Combinations > 1605.3.1.1 Stress Increases
Help Contact Us Privacy Terms
Code Compare
Code Compare
Highlight differences between any two building codes.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE