Thanks Ken, yes, I understand this.
And I understand the zone of influence and so forth.
But these Max Load Tables threw me when I got into them more- they
seemed 'backwards'. In terms of calcing the loads in the Z.O.I., the
40' spacing will be greater than the 20' spacing. But I read Appendix
E and figured it had to due with pipe deflection, not just total
weight. So If these tables apply I cannot 'tentatively' space lateral
braces at 40'. And I cannot know my calc for 4" main at 40' works and
assume my 2.5" main at 40' works because it is 'less demanding'.
I hope this makes sense.
thanks again,
Brad
Quoting Parsley Consulting <[email protected]>:
Brad,
Perhaps a better look at the form is in order.
The form template can be used for either longitudinal or lateral
seismic bracing.
Should the form be used for calculating the longitudinal bracing Fpw
the limitations in 9.3.5.5.2 do not apply. The clarification of
this is provided in the text of the section which notes, in part,
"_*Lateral*_ sway bracing shall be in accordance with either Table
9.3.5.5.2(a) through Table 9.3.5.5.2(l)..."
As I am a member of the hanging and bracing committee please see the
disclaimer below.
sincerely,
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit the website <http://www.parsleyconsulting.com/> ***
*IMPORTANT NOTICE: This correspondence is not a Formal
Interpretation issued pursuant to NFPA Regulations. Any opinion
expressed is the personal opinion of the author and does not
necessarily represent the official position of the NFPA or its
Technical Committees. In addition, this correspondence is neither
intended, nor should it be relied upon, to provide professional
consultation or services**
**
**It should be noted that the above is my opinion as a member of the
NFPA Automatic Sprinkler System Hanging and Bracing Committee in
accordance with the NFPA Regulations Governing Committee Projects
and should therefore not be considered, nor relied upon, as the
official position of the NFPA or its Committees*
On 11/27/2017 9:15 AM, [email protected] wrote:
Please refer to NFPA 13 (2016).
Figure A.9.3.5(b) is a sample sway brace calc.
at the bottom it says "Maximum Fpw per 9.3.5.5.2 (if applicable)."
My question is--
are those max load tables based on lateral brace spacing ever NOT
applicable?
thanks,
Brad
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