Span Calc
Span calculator using NDS®
#1 Keyword Rankings
Today
Top 10 Rankings
Today
Top 30 Rankings
Today
Top 100 Rankings
Today
Description
The American Wood Council (AWC) Span Calculator for Wood Joists and Rafters (Span Calc) performs calculations for all species and grades of commercially available softwood and hardwood lumber as found in the 2021 National Design Specification® (NDS®) for Wood Construction. Joists and rafter spans for common loading conditions can be determined. A span options calculator allows selection of multiple species and grades for comparison purposes.
Supported by the Softwood Lumber Board.
Maximum horizontal spans for joists and rafters are calculated based on the following assumptions and conditions:
· Joists and rafters are oriented to support vertical loads applied to the narrow (1.5 in. thick) face of the member, resulting in strong-axis bending.
· At least three joists or rafters are installed parallel to one another and spaced not more than 24 inches on-center, with properly designed sheathing attached on the top (compression) edge of each joist or rafter.
· Joists and rafters are single-span with adequate structural support at each end. The Span Calculator does not address cantilevered joists and rafters, multiple-span joists and rafters, or spliced joists and rafters.
· For joists and rafters, most building codes specify a minimum bearing length of 1.5 inches on wood or metal and not less than 3 inches on masonry or concrete. These minimum bearing lengths are to be used in the absence of calculated bearing lengths. Consult the local building code for specific requirements.
· Joists and rafters carry only combinations of dead load plus live load (D + L), dead load plus snow load (D + S), or dead load plus roof live load (D + Lr). The Span Calculator does not address wind load or seismic load.
· Buildings in regions with ground snow loads greater than 70 psf should not use the prescriptive provisions of the governing building code without approval of the authority having jurisdiction. Buildings in these high snow zones should be designed in accordance with accepted engineering practice.
While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the American Wood Council nor its members assume any responsibility for any particular design prepared from this Span Calculator application. Those using this Span Calculator assume all liability from its use.
Hide..
Show more..
Supported by the Softwood Lumber Board.
Maximum horizontal spans for joists and rafters are calculated based on the following assumptions and conditions:
· Joists and rafters are oriented to support vertical loads applied to the narrow (1.5 in. thick) face of the member, resulting in strong-axis bending.
· At least three joists or rafters are installed parallel to one another and spaced not more than 24 inches on-center, with properly designed sheathing attached on the top (compression) edge of each joist or rafter.
· Joists and rafters are single-span with adequate structural support at each end. The Span Calculator does not address cantilevered joists and rafters, multiple-span joists and rafters, or spliced joists and rafters.
· For joists and rafters, most building codes specify a minimum bearing length of 1.5 inches on wood or metal and not less than 3 inches on masonry or concrete. These minimum bearing lengths are to be used in the absence of calculated bearing lengths. Consult the local building code for specific requirements.
· Joists and rafters carry only combinations of dead load plus live load (D + L), dead load plus snow load (D + S), or dead load plus roof live load (D + Lr). The Span Calculator does not address wind load or seismic load.
· Buildings in regions with ground snow loads greater than 70 psf should not use the prescriptive provisions of the governing building code without approval of the authority having jurisdiction. Buildings in these high snow zones should be designed in accordance with accepted engineering practice.
While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the American Wood Council nor its members assume any responsibility for any particular design prepared from this Span Calculator application. Those using this Span Calculator assume all liability from its use.
Screenshots
User Rating
0 out of 5
0 ratings in United Arab Emirates
Ratings History
Reviews
App doesn't have any reviews yet
Store Rankings
Ranking History
App Ranking History not available yet
Category Rankings
App is not ranked yet
Keywords
Users may also like
| Name | Reviews | Recent release | |
|---|---|---|---|
Stair Calculator: Construction
طريقة حساب الدرج
|
0
|
4 months ago | |
Material Estimator Calculator
Estimate Construction Projects
|
0
|
1 month ago | |
Construction Calculator
Carpenter: Inch feet, fraction
|
0
|
4 months ago | |
Builder's Helper MAX
Construction Calculator +
|
0
|
2 years ago | |
Construction Master Pro Calc
Feet Inch Fraction Calculator
|
0
|
4 months ago | |
RedX سقف - حاسبة الأسقف
لعوارض والتروسات السقفية
|
0
|
2 months ago | |
Construction Master 5 Calc
Feet Inch Fraction Calculator
|
0
|
4 months ago | |
RedX Roof Builder - 3D Design
Your Advanced 3D Roof CAD Tool
|
0
|
10 months ago | |
RedX جدران - تصميم وبناء
إنشاء، تخطيط، مشاركة
|
0
|
4 months ago | |
RedX سلالم - حاسبة 3D
تصميم وحساب السلالم
|
0
|
2 months ago |
Show More
Revenue and Downloads
Gain valuable insights into Span Calc performance with our analytics. Sign up now
to
access downloads, revenue, and more.
App Info
- Category
- Utilities
- Publisher
- American Wood Council
- Languages
- English
- Recent version
- 2.15.1 (3 months ago )
- Released on
- Jul 9, 2010 (14 years ago )
- Also available in
- United States, Canada, Philippines, Poland, Peru, New Zealand, Norway, Netherlands, Nigeria, Malaysia, Mexico, Lebanon, Kazakhstan, Kuwait, South Korea, Japan, Italy, Pakistan, India, Portugal, Romania, Russia, Saudi Arabia, Sweden, Singapore, Thailand, Turkey, Taiwan, Ukraine, Vietnam, South Africa, Dominican Republic, Argentina, Austria, Australia, Azerbaijan, Belgium, Brazil, Belarus, Switzerland, Chile, China, Colombia, Czechia, Germany, Denmark, United Arab Emirates, Algeria, Ecuador, Egypt, Spain, Finland, France, United Kingdom, Greece, Hong Kong, Hungary, Indonesia, Ireland, Israel
- Last updated
- 1 month ago