I have some questions about NFPA 58 / propane installation; 1) Can a liquid line be run along the outside of a house? 2) How long could this line be? 3) This is a small house on a small lot. I would like to know if locating tanks near a flue, fresh air vent and clothes drier would be possible if the vents were extended to near the… Show more
Currently we are building a floor plan that has two combo alarms the living room space. On one side of the living room there’s a master bedroom entry, the other side is a guest bedroom entry space. What are the dimensions for a combo alarm to be installed between a living space and a bedroom space? Can we put one alarm in the middle of the living… Show more
Hello Elliot, Milt Warner has given you very good accurate information. It is best practice to follow the manufactures installation instructions. From my experience as a Firefighter/Paramedic and Fire Officer if you to follow cda cda's suggestion you will have many false activations. Gas fired appliances in normal operation produce small…
So, just got the NFPA 13 (2019 edition) and came across the some doubts:- 1) 184.108.40.206 stated "....the in-rack sprinkler system shall not be required to be hydraulically balanced with the ceiling sprinkler system". Does this statement mean we dont have to put ceiling sprinklers and rack sprinklers into the system for full hydraulic calculation?… Show more
Good morning, I would like to ask does for warehouse area there should be Commodity Classification and Occupancy Classification or only Commodity Classification? Let's imagine we have factory with production area and warehouse area. Production area should have Occupancy Classification, warehouse area should have Commodity Classification.… Show more
Depending on which NFPA standard or Building code you are using, Yes the warehouse should have an occupancy type And if needed for fire sprinkler design or other, you would need commodity class also. OHHH I am not an engineer, so you can discount my reply if you want, and I cannot do math. Click on this profile cdafd .…
I am not a professional in any regard, just a tech hobbyist that contributes on Wikipedia / Stack Exchange / Quora, etc. Regarding the recent gas explosions in Massachusetts, I am left to wonder how it is that gas technology has been in use for as long as it has, with it managing to escape the same life-safety protection systems that are… Show more
I purchased the NFPA 70E 2018 edition. Has this table been deleted or replaced. If replaced with what? thank you Roger
Section 903.2.8 requires that sprinkler systems be installed throughout all buildings with a group R fire area. The commentary supports this by clarifying that the sprinkler requirement is for the entire structure not just the R occupancy. In mixed used commercial, mercantile and Business space with a new introduced/ converted R occupancy is… Show more
Hi Mike: Your wrote: In mixed used commercial, mercantile and Business space with a new introduced/ converted R occupancy is there a provision that allows us to divide the building with fire barriers or fire walls to only sprinkler the R area? No, if a building contains a single dwelling or sleeping unit, even if it is contained within its…
In NFPA 13R, Section 6.6.6 & 6.6.8 states that Fire sprinklers are not required in noncombustible elevator shafts where the elevator cars comply with ANSI A17.1 Safety Code for Elevators, and I'm wondering if sprinklers still would not be required in the elevator shaft when a polymer coated lift belt has been installed within the shaft? Because my… Show more
Why is maximum egress distance and not queuing time considered for planning the number of stairways in a building?
Generally, maximum egress travel path is considered to arrive at the number of stairways in a building. However, queuing time(tq) in front of exit stairway doors in each floor is more critical as it is greater than the time taken for horizontal distance (exit travel path) movement on a floor(td). So why do we not consider tq for the number of… Show more
The following response is per the 2018 edition of NFPA 101. The number of stairs required in a building is dependent upon multiple factors beyond the travel distance including, but not limited to, the geometry of the building, egress paths within the building, the required capacity of means of egress per 7.3, the required number of means of…
NEC 314.29, problems with inspectors not allowing downlights in drywall ceilings without access panels at each fixture.
With the adoption of the new NEC code, inspectors are shutting down projects with LED downlights in drywall ceilings, saying you have to be able to put two hands up in the fixtures at one time or add an access panel for each downlight. Is that the intent of section 410.24? If yes, why? None of the manufacturers we've talked to have been… Show more
Im a manager of Fire/Life Safety in NYC. I was recently asked a question about fire stairs. Whats the regulations/code as far as the required fire ratings of stair cases in office buildings? where can I find this info?
I am installing exhaust fans in an industrial plant that is C-I D-I. the fans will replace passive ridge vents. Each fan will move +30K cfm. In the center of the opening below each fan is a sprinkler head. I have been instructed by the client that they don't want me to provide for FAS shutdown, Its my opinion that the FAS should have shutdown… Show more
You need to look at more than just NFPA standards. The model building and mechanical codes generally require supply and exhaust fans to be shunt tripped upon a fire alarm. You do not want to keep ventilating the fire; 30k cfm is a lot of oxygen being brought to the fire. There has been a lot of studies done about the impact of exhaust fans and…
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What is the time duration or limit for door to remain unlocked when closed in a healthcare facility?
I was told you have to allow 30 secs for a door to remain unlock when closed. It seem to be too long for areas that post as a security breach in a health care facility. If so where in NFPA 101 can I look for that reference.