For looped standpipes within the fire department pumping capability, is the standpipe hydraulic calculation allowed to take into account the loop design configuration to reduce friction loss in the system? If so, is it stated anywhere in NFPA 14 (2024 or earlier versions) to support this argument?
A compartment contains both QR standard coverage sprinklers and ESFR sprinklers. The QR standard coverage sprinklers protect a mezzanine that is not separated from the adjacent warehouse protected by ESFR sprinklers.
For the hydraulic calculation at the boundary condition (where ESFR and...
[NFPA 13 (2013)] A combustible concealed spaced is created by fastening drywall tight to the bottom of a wood truss system. The wood truss has less than a 6-inch gap between the top of bottom chord and bottom of top chord.
Are sprinklers required within this combustible concealed space, or...
Are sprinklers required?
NFPA 13 (2013), sentence 8.15.7.1 states that "sprinklers shall be installed under exterior projections exceeding 4-ft in width."
Note that NFPA 13 does not consider private balconies to contain storage. NFPA 13 notes "the committee has stated that combustibles...
Good day,
All scenarios shown in NFPA 13 for design area are of single, rectangular, rooms. What about oddly shaped rooms? Take for instance Figure A in the attached PDF. Would each sprinkler cover 120 sq.ft. (15 ft. x 8 ft.), or would it be 172.5 sq. ft. (15 ft. x 11.5 ft.)?
Exhibit 8.7 of...
There are two 4-storey residential wood frame buildings separated by approximately 15-feet. In this 15-foot separation between the two buildings is a roofed breezeway. The purpose of the breezeway is to walk from the street to a courtyard.
Does this breezeway require sprinkler protection?
I have a 10-storey noncombustible residential building that is being equipped with an NFPA 13 (2013) sprinkler system.
The ground floor storage room has stacked individual lockers that are each 30 square feet and have solid separations so each locker requires a sprinkler. With area...
For an NFPA 13 residential calculation the minimum water supply is 30 minutes. Scenario: a series of identical and adjacent small rooms each with a 1 hour wall/ceiling rating and 45 minute self closing door. One sprinkler is able to adequately protect each room.
Question: Would the...
Q (NFPA 13R, 2007):
As per 6.8.1.5.3.1, closets not larger than 400 CF may be protected by a single sprinkler at the highest ceiling space without regard to obstructions.
If that closet includes space below a combustible stair but the sprinkler at the highest elevation is obstructed from...
Hello,
I have a 3-storey wood framed residential building with no common areas. Each unit has direct access to grade. The building will be sprinklered to NFPA 13R.
The issue is the upper level of the suites has a ceiling slope of 12:12 and therefore residential sprinklers are not permitted...
I have a laboratory that contains areas for coal storage, coal mixing, and laboratory benches. There is also light hazard compartments such as offices.
To what occupancy should the coal storage, mixing, and laboratory benches be designed?
I have a 4-storey mixed-use building where the top two storeys are split-level residential suites. The exit stairway terminates at the third floor. How does one comply with NFPA 14 (2007), 7.3.2.(5) when the standpipe terminates a floor below the roof? It seems compliance is impractical in...
From what I understand sprinkler contractors in California use Hilti's Kwik-Bolt TZ expansion anchors almost exclusively for hanging pipe and sway bracing. The reason being it is listed for seismic zones while the popular Drop In Anchor is not.
In a seismic area, are we required to hang all...
Is sprinkler protection required for an NFPA 13 residential building with non-combustible balconies equipped with gas outlets for BBQ's? If so, where is the requirement stated in the Building Code or NFPA 13?
It seems that for any NFPA 13 project that uses composite wood joists a 3000 square foot calculation is required unless the composite wood joist volume is broken up into smaller 160 cubic foot volumes using 1/2" GWB or better on all faces. In other words, the joist web construction is not...
I have a simple two level rectangular building (combustible construction) with an attic space under a pitched roof. The exterior walls of the building run up through the attic to the roof assembly. The eaves run around the perimeter of the building creating a "wedged" combustible concealed...
Do solariums in single family dwellings require sprinkler protection? My feeling is they do since they are not "open" and attached. I haven't come across this before and this solarium is massive and can't be tackled with HSW's.
Thanks.
