Related Comment Relationship
Public Comment No. 297-NFPA 13-2014 [Section No. 9.3.5.5.10]
Related Item
First Revision No. 46-NFPA 13-2013 [Section No. 9.3.5.5.10]
Submitter Information Verification
Submitter Full Name: Robert Upson
Organization: National Fire Sprinkler Association
Affilliation: NFSA Engineering and Standards Committee Street Address:
City:
State:
Zip:
Submittal Date: Fri May 16 13:19:34 EDT 2014
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Public Comment No. 193-NFPA 13-2014 [ Section No. 9.3.5.11.8 ]
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9.3.5.11.8*
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The loads determined in 9.3.5.9 shall not exceed the lesser of the maximum allowable loads provided in Table 9.3.5.11.8(a), Table 9.3.5.11.8(b), and Table 9.3.5.11.8(c) or the manufacturer's certified maximum allowable horizontal loads for brace angles of 30 to 44 degrees, 45 to 59 degrees, 60 to 89 degrees, or 90 degrees.
Table 9.3.5.11.8(a) Maximum Horizontal Loads for Sway Braces with l/r = 100 for Steel Braces with Fy = 36 ksi
Area (in.2)
Least Radius of Gyration (r) (in.)
Maximum Horizontal Load (lb) Maximum
0.688 0.292 2 5 4,387 6,205 7,599
2 × 2
1.19 0.491 4 1 7,589 10,732 13,144
3 × 21⁄2 ×
1⁄4
1.31 0.528 4 4 8,354 11,814 14,469
3 × 3
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Table 9.3.5.11.8(b) Maximum Horizontal Loads for Sway Braces with l/r = 200 for Steel Braces with Fy = 36 ksi
Area (in.2)
Least Radius of Gyration (r) (in.)
Maximum Horizontal Load (lb) Maximum
Length for
l/r = 200 Brace Angle
Brace Shape
0.688 0.292 4 10 1290 1824 2234
2 × 2
1.19 0.491 8 2 2231 3155 3865
3 × 21⁄2 ×
1⁄4
1.31 0.528 8 9 2456 3474 4254
3 × 3
Table 9.3.5.11.8(c) Maximum Horizontal Loads for Sway Braces with l/r = 300 for Steel Braces with Fy = 36 ksi
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Area (in.2)
Least Radius of Gyration (r) (in.)
Maximum Horizontal Load (lb) Maximum
1.19 0.491 12 3 992 1402 1718
3 × 21⁄2 ×
1⁄4
1.31 0.528 13 2 1092 1544 1891
3 × 3
Statement of Problem and Substantiation for Public Comment
CC NOTE: The following CC Note No. 18 appeared in the First Draft Report as Global First Revision No. 25.
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The TC should review this language to confirm that the language adequately addresses the intent of the TC.
Related Item
First Revision No. 35-NFPA 13-2013 [New Section after A.9.3.5.11]
Submitter Information Verification
Submitter Full Name: CC on AUT-AAC
Organization: CC on Automatic Sprinkler Systems Street Address:
City:
State:
Zip:
Submittal Date: Tue Apr 29 14:15:04 EDT 2014
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Public Comment No. 298-NFPA 13-2014 [ Section No. 9.3.5.12.7.1 ]
9.3.5.12.7.1*
CURRENT: Concrete anchors shall be prequalified for seismic applications in accordance with ACI 355.2, Qualification of Post-Installed Mechanical Anchors in Concrete and Commentary, and installed in
accordance with the manufacturer's instructions.
PROPOSED: Concrete anchors shall be prequalified for seismic applications in accordance with ACI 355.2, Qualification of Post-Installed Mechanical Anchors in Concrete and Commentary,
ACI355.4, Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary, ICC-ES AC446 Acceptance Criteria for Cast-In Specialty Inserts, AC193, Acceptance Criteria for Mechanical Anchors in Concrete Elements, or AC308, Acceptanc Criteria for Post-Installed Adhesive Anchors in Concrete Elements. Anchors must be installed in accordance with the manufacturer's instructions.
Statement of Problem and Substantiation for Public Comment
ACI355.2 does not cover all types of concrete anchors typically used by the fire-protection industry. The additional ICC-ES acceptance criteria listed all include seismic qualification tests in accordance with either 355.2 or 355.4, and Evaluation Reports and approvals according to these acceptance criteria have a higher level of recognition - both at the design level and jobsite inspector level.
Related Item
First Revision No. 36-NFPA 13-2013 [New Section after A.9.3.6.6]
Submitter Information Verification
Submitter Full Name: Jake Olsen
Organization: STANLEY BLACK & DECKER Street Address:
City:
State:
Zip:
Submittal Date: Fri May 16 10:09:00 EDT 2014
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Public Comment No. 288-NFPA 13-2014 [ Section No. A.9.1.1.6.3 ]
A.9.1.1.6.3
Other standards equivalent to ASTM A307 grades A or B include SAE J429 Grades 1 or 2. Both fasteners are fabricated from low or medium carbon steel, and requirements have a minimum tensile strength of 60 ksi.
Statement of Problem and Substantiation for Public Comment
Although it is recognized that hanger rods should be of good quality, this requirement is virtually unenforceable and therefore unreasonable to implement. There is no practical way to mark hanger rods in order to positively identify them as meeting this requirement.
Related Public Comments for This Document
Related Comment Relationship
Public Comment No. 244-NFPA 13-2014 [Section No. 9.1.1.6.3]
Related Item
First Revision No. 38-NFPA 13-2013 [New Section after A.9.1.1.5.3]
Submitter Information Verification
Submitter Full Name: Robert Upson
Organization: National Fire Sprinkler Association
Affilliation: NFSA Engineering and Standards Committee Street Address:
City:
State:
Zip:
Submittal Date: Fri May 16 09:24:23 EDT 2014
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Public Comment No. 300-NFPA 13-2014 [ Section No. A.9.3.5.5.10.1(1) ]
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A.9.3.5.5.10.1(1)
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Figure A.9.3.5.5.10.1(1)(a) and Figure A.9.3.5.5.10.1(1)(b) are examples of how to measure the distance between the top of pipe and the point of attachment.
Figure A.9.3.5.5.10.1(1)(a) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 1).
[NEW DRAWING SUBMITTED]
Figure A.9.3.5.5.10.1(1)(b) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 2).
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[NEW DRAWING SUBMITTED]
Additional Proposed Changes
File Name Description Approved
rod_rule_revised-steel.pdf
Figure A.9.3.5.5.10.1(1)(a) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 1).
rod_rule_revised-wood.pdf
Figure A.9.3.5.5.10.1(1)(b) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 2).
Statement of Problem and Substantiation for Public Comment
The so-called “6 inch rod rule” is often misapplied. This proposal and accompanying drawings clarifies the intent and proper application of the rule.
Related Public Comments for This Document
Related Comment Relationship
Public Comment No. 297-NFPA 13-2014 [Section No. 9.3.5.5.10]
Related Item
First Revision No. 46-NFPA 13-2013 [Section No. 9.3.5.5.10]
Submitter Information Verification
Submitter Full Name: Robert Upson
Organization: National Fire Sprinkler Association
Affilliation: NFSA Engineering and Standards Committee Street Address:
City:
State:
Zip:
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Submittal Date: Fri May 16 10:20:44 EDT 2014