InTents April/May 2024 - 41

* Snow loads, when applicable, are
found in Section 3103.6.1.1. New
Table 3103.6.1.1 provides reductions
based on the assigned risk category
of the use and the service life of the
temporary structure. Risk category
determination is based on the importance
of the structure or number of
people within. For example, the new
table will allow the use of 70% as
the reduction factor. An exception allows
up to a reduction factor of 65%
in design snow loads when occupancy
control measures are in place.
Occupancy control measures include
anchoring the structure to mitigate
issues; monitoring snow, ice, wind
and other conditions before and during
occupation; and evacuating the
public if necessary.
* Wind loads were perhaps the most
debated set of reductions. These are
in the following section, 3103.6.1.2.
Interestingly, a completely independent
report by S. K. Ghosh Associates
Inc., a subsidiary of the ICC, provided
research that was very helpful for establishing
this loading condition. As
with the criteria for snow, an exception
was included to allow the use of a reduction
factor of 65% when occupancy
control measures are in place. The new
table, Table 3103.6.1.2, is set up like the
previous table and is also based on risk
categories and service life. Tom Markel,
former Tent Rental Division (TRD) representative
to the ICC, had been trying
to implement such wind reductions in a
variety of ways and really set the stage
for the ASCE ad hoc work group to draft
and ultimately be successful in the inclusion
of these reduced wind loads.
* Flood and, believe it or not, tsunami
loads have their own sections: Sections
3103.6.1.3 and 3103.6.1.6, respectively.
Both loading conditions do not have to
be considered, but occupancy control
measures need to be in place.
InTentsMag.com 41
* Seismic loading is found in Section
3103.6.1.4 and allows for a set reduction
factor of 75% in Seismic Design
Categories (SDC) C through F. These
classes correspond to specific building
occupancy group types and involve
a minimum of moderate shaking.
Projects located in SDC A and
B-minor and moderate shaking possible,
structures where there's a low
hazard to human life-do not need to
consider seismic loading.
* Ice loading is also listed in Section
3103.6.1.5 for a maximum thickness
of ½ inch for all risk categories.
During times where ice is not expected
or in non-icy conditions, no additional
loading for ice is required as
long as either the structural design is
sufficient or occupancy control methods
are in place.
The above-mentioned controlledoccupancy
procedures are listed in
the same section of the codes. An operations
management plan is necessary
that complies with American National
Standards Institute (ANSI) ES1.7 that
lists the various environmental conditions
where evacuation is required.
The proposal planned for the IFC
in the code development cycle for the
2027 edition is to coordinate with the
criteria in the 2024 IBC. There are a few
other items, but this is the most significant
revision for the temporary structure
industry. This applies to all temporary
structures, not just tents.
Paul Armstrong, P.E., C.B.O., serves as ATA's
code consultant. He can be reached at paul.
armstrong@pacodeservices.com with any
questions or comments about the proposals.
In the past, many
temporary structures
have been subject
to the full loading
conditions of
permanent buildings,
but that has now
been amended.
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InTents April/May 2024

Table of Contents for the Digital Edition of InTents April/May 2024

InTents April/May 2024 - Cover1
InTents April/May 2024 - Cover2
InTents April/May 2024 - 1
InTents April/May 2024 - 2
InTents April/May 2024 - 3
InTents April/May 2024 - 4
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InTents April/May 2024 - Cover3
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