Building Loading – Building Code

(Revised: 04/02/2024)

The Building Code tab describes the appropriate Building Code and the general purpose of occupancy. The Building Code selected will be used to define the application of the design loads to all the Shapes.

„ Note to Builder/Customer:

The builder is responsible for contacting the local building official or project design professional to obtain and provide all code and loading information for the specific building site. Data supplied is assumed to be accurate.

List Filter:

North America – Current codes to be used in North America are available for selection in the drop list

International – Current codes to be used outside North America

Legacy – Outdated codes that have a newer version most likely to be specified

Code Information:

Specifications:

Building Code

This drop list is used to specify the Building Code for the building. Information input at this level will be applied to all shapes within a project file. If the correct Building Code is not known, contact the local code officials or local code department. This information is critical for the design of the building.

Available model building codes using the North America List Filter are shown below:

Other state or country codes can be selected through the Legacy List Filter:

ANSI American National Standards Institute, National Standard

ASCE American Society of Civil Engineers

BOCA Building Officials and Code Administrators (National Building Code)

IBC International Building Code

MBMA Metal Building Manufacturers Association, Industrial Standards

NBCC National Building Code of Canada

SBC Standard Building Code, of the Southern Building Code Congress

UBC Uniform Building Code, of the International Congress of Building Officials

„ Note:

Depending on the Building Code selected, options on the other Design Loads and Codes tabs will be enabled or disabled as required by the Code.

Building Use / Importance / Risk Category

This drop list is used to describe the general purpose of the building. The 'Building Use' can differ per shape to optimize the design of different buildings on the same project site. The options vary depending on the Building Code.

„ Note:

The Building Use can be defined differently on specific shapes of a multi-shape project. This could be an economical feature if used to its fullest potential.

Example: With some building codes, the Office could be considered Standard Occupancy and the Warehouse could be considered Low Hazard.

Building Use Descriptions:

North America Building Codes:

%!JumpId(IDC_CODES_USE_1) 2023 FLBC (ASCE 7-22)

%!JumpId(IDC_CODES_USE_1) 2021/2018 IBC (ASCE 7-16), 2020 MNBC (ASCE 7-16), 2020 FL-HVHZ (ASCE 7-16)

%!JumpId(IDC_CODES_USE_1) MAST (9^th) (ASCE 7-10), 2018 WISC (ASCE 7-10), 2015 IBC (ASCE 7-10), 2012 IBC (ASCE 7-10), 2015 MNBC (ASCE 7-10), 2017 FL–HVHZ (ASCE 7-10)

%!JumpId(IDC_CODES_USE_1) 2009 IBC (ASCE 7-05), 2006 IBC (ASCE 7-05)

%!JumpId(IDC_CODES_USE_1) 2020 NBCC (S16-19)

%!JumpId(IDC_CODES_USE_1) 2015 NBCC (S16-14), 2010 NBCC (S16-14)

Legacy Building Codes:

%!JumpId(IDC_CODES_USE_1) 2003 IBC

%!JumpId(IDC_CODES_USE_1) ASCE 7-95, ASCE 7-98, 1999 BOCA

%!JumpId(IDC_CODES_USE_1) 1994 UBC, 1997 UBC

%!JumpId(IDC_CODES_USE_1) 1990 NBCC, 1995 NBCC, 2005 NBCC

%!JumpId(IDC_CODES_USE_1) ANSI, BOCA, SBC, 1988 ASCE, MAST (5^th), MAST (6^th), MAST (7^th), MAST (8^th), NCST, NYST, OBBC, WICBC, CHI, MSY, OKC, SFL, JBSA, 1993 ASCE, CONN, IBC 2000, 2001 FL, 2001 FL (HVHZ)

%!JumpId(IDC_CODES_USE_1) 1988 UBC, 1991 UBC, MUBC, LLB, PHX, SEA

%!JumpId(IDC_CODES_USE_1) 1986 MBMA

Structural

This field displays the Steel Design Specification that applies for the selected Building Code. This will affect the design of primary members such as mill (hot roll) columns, and 3-plate columns, rafters, and mezzanine beams.

„ Note:

2022 AISC (American Institute of Steel Construction, 16^th Edition) is required when designing for 2024 IBC

2016 AISC (American Institute of Steel Construction, 15^th Edition) is required when designing for 2021/2018 IBC

2010 AISC (American Institute of Steel Construction, 14^th Edition) is required when designing for 2015/2012 IBC

2005 AISC (American Institute of Steel Construction, 13^th Edition) is required when designing for 2009/2006 IBC

S16-2019 is used when designing for 2020 NBCC

S16-2014 is used when designing for 2015 NBCC, 2010 NBCC, 2005 NBCC and 1995 NBCC

Most other Codes use 1989 AISC 9^th Edition

Cold Form

This field displays the “Rolled Gage Section - Steel Design Specification” that applies for the selected Building Code. This will affect the design of secondary members such as girts, purlins, jambs, headers, and Truss Purlins.

„ Note:

The software will automatically use the most current version of the Cold Form specification (AISI - American Iron and Steel Institute) for designing gage members based on the Building Code being used.

Rainfall

In this edit box, enter the Rainfall intensity measured in inches per hour. This is based on 5-minute duration, with a 5-year recurrence (MBMA I1 Rainfall Intensity). The Rainfall Intensity is used to determine how many downspouts are required for the building configuration. The check is done in accordance with MBMA Appendix A4, with a standard 4”x5” downspout and a 7”x7” eave gutter. For other configurations of gutter and downspouts, manual calculations are necessary to determine the proper number of downspouts required. A recommended website to find the Rainfall value is: PF Data Server-PFDS/HDSC/OWP (noaa.gov)

„ Note: Canada specifies rain fall in terms of mm/15-minutes with a 10 year MRI. This needs to be converted to inches/hour for software input.

Building Code Alias (Optional)

In this edit box, enter the full name of the Building Code you wish to show on all Reports, if different than the standard building code selected.

„ Example: Ohio has accepted the 2012 IBC, but the official building code title/alias is “2011 Ohio Building Code”. This Building Code Alias is then shown in the Reports.

Alias Code

This edit box has no impact for users of the software.

Perform Second-Order Analysis

This option affects how frames and bracing are analyzed and must be used for 2006 IBC and later projects. Beginning with 2006 IBC (and the 2005 AISC Specification), primary framing (frames and bracing) is required to be designed for Second-Order effects. Any frame subjected to lateral deflection or drift experiences P-Delta (P-∆) effects; that is, gravity loads on the deflected columns WILL cause additional movement of the frame being analyzed. The net result is that slightly larger forces will be generated in the framing structure.

„ Note:

The older steel specification, 1989 AISC, accounted for Second Order behavior by conservatively adjusting various design parameters during design of frame members. 2005 AISC and later more correctly accounts for the Second-Order behavior during the analysis phase and NOT during the designing phase.

Concrete Compression Strength

In this edit box, enter the concrete compressive strength to be used under the column base plates (3000.00 psi is default). The minimum value that will be accepted in the edit box is 2000.00 psi.

Use LRFD

Two approaches when designing structural members are allowed, beginning with 2006 IBC (2005 AISC); ASD (Allowable Stress Design) and LRFD (Load and Resistance Factor Design). The system default is ASD design; however, LRFD may be activated by checking the “Use LRFD” box.

While the system default is ASD, either option may be used when attempting to generate the most cost-effective design for a given project. A rule of thumb is that the LRFD option is more likely to produce lighter (less costly) frames when the (Dead + CG) to Live load ratios are higher.

„ Note:

Canadian codes use Limits State Design (LSD) design procedure. LRFD is not an option with the Canadian codes.

Standard Controls:

§ OK, Cancel, Apply, Help

See also:

§ Building Loading - Live Load

§ Building Loading - Wind Load

§ Building Loading - Snow Load

§ Building Loading - Seismic

§ Building Loading - Tornado Load

§ Building Loading - Deflection Conditions