• IBC 2024 references ASCE 7-22
• Risk Category Based Design: Each Risk Category has its own map with corresponding wind speed
• No Importance Factor used when calculating Design Wind Pressure
• Major Updates: New tornado load provisions, updated wind speed maps, enhanced seismic design requirements

Roof Live Load (Lr)

• Standard: 20 PSF (Some local jurisdictions may require heavier loads)
• Live Load Reduction: Can be reduced to as low as 12 PSF for primary framing based on roof plane size and bay spacing
• Definition: Loads produced during maintenance by workers, equipment, materials, and movable objects (excludes Wind, Snow, Seismic, Dead Loads)

Floor Live Loads

• First Floor: XX PSF (Ground Floor design)
• Second Floor: XX PSF (Usually 2nd Floor or Mezzanine)
• Minimum: Must meet Table 1607.1 IBC requirements based on occupancy

Wind Speed & Exposure

• Basic Wind Speed: 3-second gust from IBC 2024 Fig. 1609.3 or ASCE 7-22 Fig.26.5-1

• Ultimate Wind Speed (VULT): IBC 2024/ASCE 7-22 values with updated velocity pressure equations
• Updated Maps: Enhanced wind speed maps based on recent climate data and extreme weather events

Wind Exposure Categories

Wind Enclosure Classifications *

*Can be system calculated based on wall opening type input

Tornado Loads (NEW in IBC 2024)

• Tornado Wind Speed: Based on Enhanced Fujita Scale
• Application: Required for Risk Category III & IV structures in tornado-prone regions
• Design Criteria: Enhanced anchoring and connection requirements

Load Applications

• Main Wind Force Resistance: Wind loads on frames and bracing
• Component & Cladding: Wind loads on purlins, girts, panels, endwall columns

Ground Snow Load (Pg)

• Definition: Maximum expected snow at ground elevation for 50-year Mean Recurrence Interval
• Value: XX PSF (Location specific)
• Updated Maps: Refined snow load data incorporating climate change projections and recent extreme weather patterns

Roof Snow Load Calculation

Snow Exposure Factor (Ce)

Thermal Factor (Ct)

Snow Importance Factor (Is)

Spectral Response Accelerations (USGS Maps)

• Ss: Short Period Acceleration (0.2 sec) - Always larger than S1
• S1: Long Period Acceleration (1.0 sec)
• Updated Parameters: Enhanced seismic hazard maps incorporating recent seismological research and ground motion prediction models

Design Accelerations (Calculated by eQuote360)

• Fa & Fv: Based on site class and spectral accelerations

Site Classes

*Requires soils report or sealed document

Seismic Design Categories

• Categories D+: Require special inspections, pre-tensioned bolts, and special detailing requirements
• Analysis Method: Equivalent Lateral Force (used by eQuote360)
• Response Modification Factor (R) 3.0 for Categories A-C (Updated values for other categories)
• Reference: ASCE 7-22 Table 12.2-1(H) - Steel Systems not detailed for seismic resistance

Seismic Importance Factor (Ie)

Dead Load

• Definition: Self-weight of building system construction
• Value: Calculated based on materials
• Updated Requirements: Enhanced consideration for modern building materials and systems

Collateral Load

• Definition: Weight of additional permanent materials (sprinklers, HVAC, electrical, partitions, ceilings)
• Typical Value: XX PSF

Typical Collateral Load Components

Design Rain Load

• Updated Formula: Enhanced calculations incorporating climate change impacts

Ponding Load Considerations

• Improved requirements for extreme precipitation events
• Enhanced calculation methods for secondary drainage systems
• Updated deflection limits to prevent progressive ponding
• Climate resilience factors

Definition

Movement of structure relative to supports due to applied loads

Standard Limits

Calculation Examples

• 25'-0" beam: 25' × 12 = 300"
• L/180: 300"/180 = 1.67" maximum deflection
• 20'-0" column: 20' × 12 = 240"
• H/240: 240"/240 = 1.0" maximum deflection
• H/90: 240"/90 = 2.67" maximum deflection

Per IBC 2024 Section 1605.2:

Basic Combinations

1. 1.4D
2. 1.2D+1.6L+0.5 (L_r \text{ or } S \text{ or } R)
3. 1.2D + 1.6(L_r \text{ or } S \text{ or } R) + (1.0L \text{ or } 0.5W)
4. 1.2D + 1.0W + 1.0L + 0.5(L_r \text{ or } S \text{ or } R)
5. 1.2D+1.0E+1.0L+0.2S
6. 0.9D+1.0W
7. 0.9D+1.0E

Special Combinations (Updated)

• Flood: 1.2D + 1.0F_a + 1.0L
• Atmospheric Ice: 1.2D + 1.0D_i + 1.0L + 0.2S
• Tornado (NEW): 1.2D + 1.0T + 1.0L
• Enhanced Rain: Updated rain load combinations per ASCE 7-22

Climate Change Considerations

• Enhanced extreme weather provisions
• Updated temperature ranges for thermal effects
• Increased precipitation factors
• Wind speed adjustments for changing climate patterns

Sustainability Requirements

• Energy efficiency provisions
• Renewable energy integration considerations
• Resilient design requirements for essential facilities

Useful Resources

• Wind/Snow/Seismic Data: https://hazards.atcouncil.org/
• Seismic Data: https://earthquake.usgs.gov/designmaps/us/application.php

Units & Conversions

• PSF: Pounds per Square Foot
• PLF: Pounds per Linear Foot
• KSI: Kips per Square Inch
• PSI: Pounds per Square Inch (1 PSI = 144 PSF)
• Kip: 1,000 pounds
• MPH: Miles per Hour

Key Organizations

• ASCE: American Society of Civil Engineers
• AISC: American Institute of Steel Construction
• AISI: American Iron and Steel Institute
• IBC: International Building Code
• MBMA: Metal Building Manufacturers Association
• USGS: US Geological Survey
• UFC: Unified Forces Command

Category Definitions

Important Notes

• MRI: Mean Recurrence Interval (2% chance = 50-year MRI)
• Occupancy: Chapter 16 definition (NOT Chapter 3 occupancy)
• Longitude: Must be negative for US locations when using USGS tools
• GPS Coordinates: Available in Google Maps by placing cursor over location

• Tornado Load Provisions: New requirements for tornado-resistant design
• Climate Resilience: Enhanced provisions for extreme weather events
• Updated Wind Maps: Refined wind speed data incorporating recent climate research
• Enhanced Seismic Provisions: Updated ground motion parameters and site coefficients
• Sustainability Integration: Requirements for renewable energy and resilient design
• Solar Panel Considerations: Updated dead load provisions for rooftop solar installations
• Battery Storage Systems: New provisions for energy storage system loads

• Hydrostatic Loads: Standing water pressure
• Hydrodynamic Loads: Moving water forces
• Wave Loads: Breaking wave impacts
• Debris Impact Loads: Floating debris collision forces
• Sea Level Rise: Updated base flood elevations incorporating climate projections

• Enhanced Access Requirements: Improved provisions for equipment maintenance access
• Safety Systems: Updated requirements for fall protection and emergency egress
• Inspection Access: Clear requirements for structural inspection accessibility

This cheat sheet is designed for use with eQuote360 metal building design software and should be used in conjunction with the complete IBC 2024 and ASCE 7-22 standards . This represents the most current building code requirements as of 2024 .