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Fargo Truss Systems Inc.  ·  Internal Use Only

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Engineering Reference Tools

Fargo Truss Systems Inc.  ·  Internal Use Only

Some reference values use standard published tables — verify against your jurisdiction's adopted code

Point Load Conversions

Decompose a total point load into dead and live components for roof or floor systems.

Rafter & Joist Span Tables

Look up maximum allowable spans for common lumber sizes and species per IRC tables.

Lumber Sizing & Species

NDS reference design values — Fb, E, Fv — for common species and grades.

Snow & Wind Loads

ASCE 7 ground snow loads and basic wind speeds by state and city reference.

Delivery Calculator

Calculate delivery rates by vehicle type, distance, weight, and ply count with automatic load flagging.

Steel Shapes

AISC v16.0 database — look up dimensions and properties for W, HP, C, MC, L, HSS, and PIPE sections.

Heel Height Calculator

Calculate truss heel height from overhang length, roof pitch, and fascia height.

Company Resources

Company Resources

Policies & procedures, design standards, delivery pricing, HR, technical, and materials documents.

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Point Load Conversions

Decompose a total point load into dead and live load components

Input Values
psf
psf
lbs
Results
Dead Load
—
lbs
Live Load
—
lbs
Total
—
lbs
D / L Split
—
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Rafter & Joist Span Tables

Maximum allowable spans — 2024 International Residential Code (IRC)

⚠ Important notice. These are standard 2024 IRC prescriptive code spans for conventional light-frame construction. They do NOT apply to roof trusses or floor trusses, and do NOT account for local code amendments or jurisdiction-specific requirements. Values assume dry service, normal load duration, repetitive member use (Cr=1.15). Always verify against your jurisdiction's adopted code and consult a licensed engineer for all structural decisions.
Selection
Max Allowable Span by Size
OC Spacing 2×6 2×8 2×10 2×12
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Lumber Sizing & Species

NDS 2024 Supplement reference design values — Tables 4A & 4B (AWC)

Selection
Reference Design Values
Grade Fb Ft Fv Fc⊥ Fc E ×1k
⚠ Reference values only. Values are from the AWC NDS 2024 Supplement, Tables 4A & 4B. Tabulated for normal load duration and dry service conditions. Apply all applicable adjustment factors (CD, CM, Ct, CF, Ci, Cr, etc.) before use in design per NDS 4.3.
Design Value Definitions
Fb
Bending psi
Extreme fiber stress in bending. The primary value for sizing beams, joists, and rafters. Governs horizontal members carrying floor and roof loads.
Ft
Tension Parallel to Grain psi
Allowable tensile stress along the grain. Used for truss bottom chords and other tension members. Typically 60–70% of Fb.
Fv
Shear Parallel to Grain psi
Horizontal shear stress capacity. Controls at supports and notched members. Can govern deep beams with heavy concentrated loads near reactions.
Fc⊥
Compression Perpendicular to Grain psi
Bearing stress at supports and bearing plates. Controls required bearing length at wall plates, beam seats, and post bases. Based on a deformation limit, not rupture.
Fc
Compression Parallel to Grain psi
Allowable compressive stress along the grain. Governs column and stud design. Apply column stability factor CP for slender members per NDS 3.7.
E
Modulus of Elasticity ×1,000 psi
Member stiffness — used to calculate deflection under load. Does not receive a load duration factor (CD). Controls spans where deflection limits (L/360, L/240) govern over strength.
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Snow & Wind Loads

ASCE 7-22 reference values by location and risk category

Filters
Reference Values — Cat II
City State Elev (ft) Pg (psf) Wind (mph) W2
 ·  Source: ASCE 7-22 via ascehazardtool.org
⚠ Generic reference values only. Values shown are generic minimums for the city center location and will vary by specific site address, terrain, topography, elevation, and local jurisdictional amendments. For address-specific values use the ASCE Hazard Tool at ascehazardtool.org. Always confirm with the Authority Having Jurisdiction (AHJ) and consult a licensed building designer or structural engineer before use in design.
Value Definitions
Pg
Ground Snow Load psf
The weight of snow on the ground at a given location for the selected Risk Category. Used as the starting point for roof snow load calculations per ASCE 7-22 Ch. 7. Apply roof factor Cs, exposure factor Ce, and thermal factor Ct to get design roof snow load.
Wind
Basic Wind Speed mph, 3-sec gust at 33 ft, Exposure C
The reference wind speed for the selected Risk Category. Higher categories have higher wind speeds because they represent structures that must remain functional during extreme events. Used with velocity pressure equation q = 0.00256 × Kz × Kzt × Ke × V² per ASCE 7-22 §26.10.
W2
Winter Wind Parameter dimensionless
Used only for roof snow drift calculations per ASCE 7-22 §7.6. Represents the ratio of coincident wind speed during winter months relative to annual wind. Does not change with Risk Category. Values near 1.0 indicate high winter winds that increase drift potential.
Risk
Cat
Risk Categories
Cat I — Low risk: ag buildings, minor storage, temporary structures.
Cat II — Standard: most residential and commercial buildings.
Cat III — Assembly occupancies, schools, >300 occupants.
Cat IV — Essential: hospitals, fire stations, emergency response.
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Delivery Calculator

Calculate delivery rates by vehicle, distance, weight, and ply count

Note: Rates beyond 100 miles for crane and flatbed/roll off deliveries require approval from Larry or Jeff. Gooseneck deliveries require pre-approval for size & weight. 2504 is limited to LVL, hardware, and small local deliveries only. All rates are subject to change — verify against current posted rate tables.
Delivery Details
mi
lbs
ply
Enter distance to generate a quote
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Admin Panel Manager Access

Manage users, documents, pricing, and tool settings

User Management
Add, disable, or remove employee and manager accounts
Name Email Role Status Actions
Document Manager
Upload, update, and manage company documents by category
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Policies & Procedures
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Design Standards
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Delivery & Pricing
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HR / Employee Info
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Technical Documents
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Materials
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Delivery Rate Editor
Update base rates, per-mile charges, thresholds, and approval contacts
⚙ Global Settings
mi
Data Export & Backup
Download a backup of all app data
Downloads a JSON export of all user and document data
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Company Resources

Policies, procedures, design standards, and reference documents

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Policies & Procedures

Company policies, safety procedures, and operational guidelines.

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Design Standards

Engineering design standards, specifications, and reference materials.

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Delivery & Pricing

Delivery rate tables, pricing structures, and zone maps.

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HR / Employee Info

Employee handbook, benefits information, and HR documents.

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Technical Documents

Technical specifications, engineering references, and product data.

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Materials

Lumber species, grades, connectors, plating, and material data sheets.

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Resources

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Documents

Document
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Manage documents in this category

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Steel Shapes

AISC Shapes Database v16.0 — Imperial & Metric

Source: American Institute of Steel Construction (AISC), Steel Construction Manual, 16th Edition — AISC Shapes Database v16.0 (2023). All dimensions and properties reproduced directly from the published database without modification. For design use, always verify against the current edition of the AISC Steel Construction Manual.
1285 shapes
Cross-Section Reference
Select a shape
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Heel Height Calculator

Calculates the approximate heel height required to align the bottom of your fascia with the top of the top plate.

Reference Diagram
Heel Height Reference Diagram
Input Values
in
/ 12
in
Result
Heel Height
—
inches
Heel Height
—
ft – in
Quick Reference — Common Pitches

Using current overhang and fascia inputs. Current pitch highlighted.

Pitch Rise over O.H. Heel Height (in) Heel Height (ft-in)
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