Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: SMACNA Manual

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Hope this is what you wanted,

ASCE 7-10
13 Seismic Design Requirements for NonStructural Components
13.1.3 Component Importance Factor
All components shall be assigned a component importance factor as indicated 
 in this section.  The component importance factor, Ip, shall be taken as 
1.5 if any of the following conditions apply:
1. The component is required to function for life-safety purposes after an 
earthquake, including fire protection sprinkler systems and egress stairways. 

2. The component conveys, supports, or otherwise contains toxic, highly 
toxic, or explosive substances where the quantity of the material exceeds a 
 threshold quantity established by the authority having jurisdiction and is 
 sufficient to pose a threat to the public if released.
3. The component is in or attached to a Risk Category IV structure, and it 
is needed for continued operation of the facility or its failure could impair 
 the continued operation of the facility.
4. The component conveys, supports, or otherwise contains hazardous substances 
 and is attached to a structure or portion thereof classified by the authority 
 having jurisdiction as a hazardous occupancy.

All other components shall be assigned component importance factor Ip, equal 
 to 1.0

Exemptions ...
Temporary or moveable equipment
Architectural stuff in B
Mech. & Elect. in B
Mech. & Elect. in C, provided Ip = 1.0
Mech & Elect. in D provided Ip = 1.0, positive attachment, flexible connection 
 if <400 lbs & < 4' above floor or <20 lbs.
Valerie Eskelsen
636-448-3639 (cell)

 From: Thor Tandy <vicpeng(--nospam--at)>
To: seaint-seaosc(--nospam--at)
Sent: Friday, May 9, 2014 2:39 PM


I'm looking for the "Ip" factor for ducting seismic load calcs.  We don't
have that factor here unless it's an importance factor but it is in ASCE-7
to which the SMANCNA manual pledges loyalty.

I don't have a copy of ASCE-7 so would a kind soul, pretty please, be able
to send me the appropriate clauses etc for ducting calcs?


Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE, FEC
Victoria, BC

Email:  <mailto:vicpeng(--nospam--at)> vicpeng(--nospam--at)

hst_ngc4414_9925Please consider the environment before printing out this

Post your message to the list by sending it to: 

The email messages sent to the list will be saved in an archive on the World Wide Web.
These archives are located at:

To contact the list owner, send your message to:

Sponsored By: Pacific Structural & Forensic Engineers Group, Inc. (PSFEG)

To unsubscribe, switch to/from digest, get on/off vacation, or change your email address, click here.