Fire department access: the address, the road, the hydrant, the key box and the FDC
Everything inside the building depends on the fire department getting to it. Five things to check from the street before you walk in.
A sprinkler system, a standpipe and a fire alarm system all assume the fire department can find the building, reach it and get in. NFPA 1 covers that outside work. None of it is complicated, and all of it can be checked before you open the front door.
The address
The address is posted so it can be read from the street the property fronts, in figures that contrast with their background (NFPA 1 Chapter 10).
From the field
Check it at night and from a moving vehicle, which is how it will actually be read.
Access roads
Fire department access roads are kept clear at all times, with the required width and turning room, and marked where marking is required (NFPA 1 Chapter 18).
Hydrants and the fire department connection
Hydrants stay accessible and unobstructed, with clear space around them, and are inspected and flow tested on their own cycle (NFPA 1 Chapter 18, NFPA 25).
The fire department connection stays visible, reachable, identified by a sign, and fitted with its caps or plugs (NFPA 1 Chapter 13, NFPA 25 Chapter 13).
The access box
The AHJ has the authority to require an access box where getting into or around a structure is difficult because of security (NFPA 1 Chapter 18). It goes in an accessible location and is an approved type listed to UL 1037.
The box is not automatically required everywhere. It is required where the AHJ requires it. Once it exists, the owner or occupant has a duty to notify the AHJ whenever access is changed in a way that could prevent fire department access. That duty sits with the owner or occupant, not with the fire department to discover.
From the field
Locks get rekeyed and nobody updates the box. Ask when the keys were last checked, not whether a box exists, and point at the owner notification duty when they shrug.
A quick outside checklist
| Item | What to look for | Where it comes from |
|---|---|---|
| Address | Readable from the street it fronts, contrasting figures | NFPA 1 Chapter 10 |
| Access road | Clear, required width and turning room, marked where required | NFPA 1 Chapter 18 |
| Hydrant | Accessible, clear space around it, on its own test cycle | NFPA 1 Chapter 18, NFPA 25 |
| Access box | Where the AHJ requires one: accessible, UL 1037, keys current | NFPA 1 Chapter 18 |
| Fire department connection | Visible, reachable, signed, caps or plugs in place | NFPA 1 Chapter 13, NFPA 25 Chapter 13 |
Keep reading
Fire alarm audibility: sound levels, ambient measurement and the evacuation signal
A horn passes or fails against the room it is in, not its data sheet. Measure the ambient first, then check the margin, the ceiling and the signal itself.
Heat detector spacing and temperature ratings under NFPA 72
Pick the rating against the hottest the ceiling gets, keep off the corner, and only halve the spacing in the direction the code says.
Box fill and conduit fill basics for fire alarm work
Box fill counts more than wires, and conduit fill depends on how many conductors are in the pipe. The parts of the count people leave out.
Manual pull stations: placement, height and travel distance
Measure to the handle, put one by every exit, then walk the floor to check nobody is more than 200 feet from one.
Smoke detector sensitivity testing: measured, not sprayed
Canned smoke proves a detector responds. It does not prove it is in calibration. Here is the schedule, and how the longer interval is earned and lost.
Waterflow and supervisory signals from the sprinkler system
The 90 seconds is the device, not the horns. What the waterflow and supervisory devices have to do, and how many go on one circuit.