Span Calc vs RedX Roof - Rafter Calculator Usage & Stats
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.
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Introducing the RedX Roof Pro App, your ultimate time-saving solution with a Free Rafter Calculator, Construction Calculator, and tools for Gambrel Roof Trusses, Bay Roofs, Truss Hip Rafters, Hip Rafters, Valley Builders, Truss Builders, Plywood Angle Calculations, Turret Roof Construction, and Dormer Building. Save hours of work with this fast and user-friendly app, designed to provide precise measurements for various projects.
Key Features:
- Supports CM, MM, Feet & Inches measurements
- Generate 2D and 3D rafter plans with accurate measurements
- Easy to understand Hip Rafter Builder with interactive 3D plans
- Plywood Angles tool for perfect plywood cuts
- Valley Builder feature for quick and accurate valley construction
- Gable Truss Builder for easy truss design and measurements
- Additional tools for Turret Roofs, Dormers, Gambrel Trusses, Truss Hip Rafters, and Bay Roofs and more.
COMMON RAFTERS:
Easily create to-scale 2D and 3D rafter plans by simply inputting the roof angle, run length, and overhang length. The app generates essential measurements, including total rafter length, rise from the top of the wall and facia, rafter tail length, and birds-mouth measurements.
HIP RAFTER BUILDER:
Just enter the Roof Pitch and Run to generate a 3D Hip Rafter plan with detailed measurements, such as hip rafter length, hip backing angles, jack rafter lengths, bevel angles, and more.
PLYWOOD ANGLES:
Effortlessly determine the correct plywood angle by inputting two roof pitches. The app generates a to-scale plywood plan with precise top, bottom, and side measurements, saving you time and ensuring perfect cuts.
VALLEY BUILDER:
This powerful feature generates a 3D Valley Plan with ridge length, sleeper board length, rafter lengths, angles, and bevels, by simply inputting the first and second roof pitch, rafter spacing, and first truss height.
GABLE TRUSS BUILDER:
Input the total truss length, roof pitch, and stud spacing to generate a to-scale truss plan with accurate measurements.
Discover the convenience and accuracy of the RedX Roof App – the ultimate roof tool for professionals and DIY enthusiasts alike. Download now and revolutionize your projects!
We are always adding new features every few of weeks, view the new features inside the app.
Terms Of Use
https://www.redxroof.com/terms-of-use
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In app purchase are available for some premium features
If you choose to purchase Roof App Premium Monthly Subscription or Yearly subscription, payment will be charged to your iTunes account, and your account will be charged for renewal within 24-hours prior to the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the App Store after purchase. Current Roof App Pro subscription price starts at $3.99 USD/month. 12-month packages are available at $23.99 USD/Year, Prices are in USD dollars, prices may vary in countries other than the USD and are subject to change without notice. No cancellation of the current subscription is allowed during the active subscription period.
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Span Calc VS. 
RedX Roof - Rafter CalculatorDecember 26, 2024