Hi
I have modeled a 8-storey building in designbuilder software. there is a the problem in its cooling load report; The report indicates heat transfer in middle floors which are located between 2 conditioned spaces. I made the software to ignore thermal mass effect. Is it a bug in the software...
hi guys
I have a problem with my pressure regulating landing valve.When i close nozzle and open landing valve, the connection will get out the its place:
But all of a sudden, in one of the fire cabinets, the air vent open and a little air comes out, then the connection stays in its place...
hi guys
i have a problem with my design and i will appreciate if anyone can help me.
i have a room in basement, that has high humid weather. its a residential room. is it possible to use exhaust fan for reducing humidity? if yes, how many ACH should i take?
hi guys;
Is there any approval (like fm ,ul or lpcb) or standard code for salt spray test for fire alarm systems? I live in an island with 85% humidity which seawater causes corrosion in fire alarm devices which have lpcb approvals.
hi guys;
Which kind of smoke/heat detectors is suggested in high humidity weather? I'm working in an Island which humidity have destructive effects on detectors, and after a period of time make false alarms.
hi guys;
I have a petroleum factory which is stored flammable liquids in tanks. There is a table in NPFA10 that tell us the fire extinguisher size and placement for class B fire.
But also there is paragraph which is said:
6.3.2.3 For flammable liquid hazards of appreciable depth, a
Class B...
hi guys
I want to choose pipe sizes for fire sprinkler system. The Hazan-Williams formula have flow rate, pressure loss and pipe diameter. For determining the pipe diameter, the value of flow rate and pressure loss have to be known. We have flow rate from the required flow rate for each...
Hi guys
Its about 5 days that Im researching about sprinkler above drop ceiling but I can decide its a mandatory to install sprinkler above drop ceiling or not. In NFPA there are a few clauses about drop ceiling.
8.15.23 Spaces Above Ceilings.
8.15.23.1 Where spaces have ceilings that are lower...
Hi guys,
In nfpa 13 we have a table for determining required flow rate for hose stream. May you tell me what tell me which number in second column is required?
for example for light hazard we have 0, 50 and 100 gpm for hose stream flow rate. which one shall we consider?
Hi friends,
Please read this part of NFPA13:2016
A.7.2.3.1 The 60-second limit does not apply to dry systems with capacities of 500 gal (1900 L) or less, nor to dry systems with capacities of 750 gal (2850 L) or less if equipped with a quick-opening device.
This part allow us to omit the time...
dear friends,
May you tell me is there any limitation in number of sprinkler heads per riser for multistory buildings? Table 23.7.3.4 in NFPA 13 determine the number of sprinkler heads for branch pipes based on pipe size. Shall we use that table for riser pipe size or we should use the area...
hi guys,
The table below mentioned the number of sprinklers for pipes below 4 in. I have residential building which have 126 sprinklers in 1 floor. Which pipe size can I choose for this project.
[img https://res.cloudinary.com/engineering-com/image/upload/v1542627443/tips/Capture_jxeqbp.jpg
TNX
hi
i have a system III standpipe which the wet riser and dry riser are separate. i want to size the pump for this system.shall i size the wet riser based on system II and dry one based on system I in NFPA 14? i mean assuming 100 gpm for wet riser and 500 gpm for dry riser.
tnx for your help
hi
i have a 13 stories commercial and office building that is partially sprinklered, i want to calculate requirement water flow rate for hose streams. shall i consider 500 gpm for hose stream flow rate? or 1250 gpm because of lack of sprinkler system?
the building is in light hazard.
tnx for ur help
