Building Loading – Building Code
(Revised:
05/13/2024)
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– Outdated codes that have a newer version most likely to be specified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
MBMA
NBCC National Building
Code of Canada
SBC
UBC
„
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:
2023 FLBC (ASCE 7-22)
2021/2018 IBC (ASCE 7-16), 2020 MNBC (ASCE
7-16), 2020 FL-HVHZ (ASCE 7-16)
MAST (9th) (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)
2009 IBC (ASCE 7-05), 2006 IBC (ASCE 7-05)
2020 NBCC (S16-19)
2015 NBCC (S16-14), 2010 NBCC (S16-14)
Legacy Building Codes:
2003 IBC
ASCE 7-95, ASCE 7-98, 1999 BOCA
1994 UBC, 1997 UBC
1990 NBCC, 1995 NBCC, 2005 NBCC
ANSI, BOCA, SBC, 1988 ASCE, MAST (5th),
MAST (6th), MAST (7th), MAST (8th), NCST,
NYST, OBBC, WICBC, CHI, MSY, OKC, SFL, JBSA, 1993 ASCE, CONN, IBC 2000, 2001
FL, 2001 FL (HVHZ)
1988 UBC, 1991 UBC, MUBC, LLB, PHX, SEA
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, 16th Edition) is required when designing for 2024 IBC
2016 AISC (American Institute of Steel
Construction, 15th Edition) is required when designing for 2021/2018
IBC
2010 AISC (American Institute of Steel
Construction, 14th Edition) is required when designing for 2015/2012
IBC
2005 AISC (American Institute of Steel
Construction, 13th 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 9th
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.
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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 Limit State Design
(LSD) design procedure. LRFD is not an
option with the Canadian codes.
Standard
Controls:
See also:
§
Building Loading - Live Load
§
Building Loading - Wind Load
§
Building Loading - Snow Load
§
Building Loading - Seismic Load
§ Building Loading - Tornado
Load
§ Building Loading - Rain Load
§
Building Loading - Deflection Conditions