- Plot plan of the park drawn to scale, indicating elevations, property lines, driveways, existing or proposed buildings, and the sizes of manufactured home lots.
- Complete specification and piping layout of proposed plumbing systems or alteration.
- Complete specification and layout of proposed sewage disposal system or alteration.
- The nature and extent of the work proposed, showing clearly that such work will conform to the provisions of this code.
|SIZE OF DRAINAGE |
|MAXIMUM NUMBER OF FIXTURE UNITS|
|PIPE SIZE||SLOPE |
(per 100 feet)
|PIPE SIZE||SLOPE |
(per 100 feet)
- The conduit shall be not less than Schedule 40 pipe that is approved for underground installation beneath buildings.
- The interior diameter of the conduit shall be not less than 1/2 of an inch (15 mm) larger than the outside diameter of the gas piping.
- The conduit shall extend to a point not less than 4 inches (102 mm) beyond the outside wall of the manufactured home or accessory building or structure, and the outer ends shall not be sealed.
- Where the conduit terminates within a manufactured home or accessory building or structure, it shall be accessible, and the space between the conduit and the gas piping shall be sealed to prevent leakage of gas into the building. [NFPA 501A:18.104.22.168 — 22.214.171.124.4]
DEMAND FACTORS FOR USE IN CALCULATING GAS PIPING SYSTEMS IN M/H COMMUNITIES [NFPA 501A: TABLE 126.96.36.199]
|NUMBER OF M/H SITES||BRITISH THERMAL UNITS PER HOUR PER M/H SITE|
|Over 60||50 000|
- Supply from an outside underground tank (see Section E 404.6).
- Supply from a centralized oil distribution system designed and installed in accordance with accepted engineering practices and in compliance with NFPA 31.
- Supply from an outside aboveground tank (see Section E 404.6). [NFPA 501A:4.3.9]
- The main distribution pipeline shall be permitted to be connected to a tank or tanks having an aggregate capacity not exceeding 20 000 gallons (75 708 L) at a point below the liquid level.
- Where this piping is so connected, a readily accessible internal or external shutoff valve shall be installed in the piping as close as practicable to the tank.
- If external and aboveground, the shutoff valve and its tank connections shall be made of steel.
- Connections between the tank(s) and the main pipeline shall be made with double swing joints or flexible connectors, or shall otherwise be arranged to permit the tank(s) to settle without damaging the system.
- If located aboveground, the connections specified in Section E 403.13(4) shall be located within the diked area.
- A readily accessible and identified manual shutoff valve shall be installed either inside or outside of the structure in each branch supply pipeline that enters a building, mobile home, travel trailer, or other structure. If outside, the valve shall be protected from weather and damage. If inside, the valve shall be located directly adjacent to the point at which the supply line enters the structure.
- A device shall be provided in the supply line at or ahead of the point where it enters the interior of the structure that will automatically shut off the oil supply, if the supply line between this device and the appliance is broken. This device shall be located on the appliance side of the manual shutoff valve required in Section E 403.13(6) and shall be solidly supported and protected from damage.
- Means shall be provided to limit the oil pressure at the appliance inlet to a maximum gauge pressure of 3 pounds-force per square inch gauge (psig) (21 kPa). If a pressure-reducing valve is used, it shall be a type approved for the service.
- A device shall be provided that will automatically shut off the oil supply to the appliance if the oil pressure at the appliance inlet exceeds a gauge pressure of 8 psig (55 kPa). This device shall not be required under either of the following conditions:
- Where the distribution system is supplied from a gravity tank and the maximum hydrostatic head of oil in the tank is such that the oil pressure at the appliance inlet will not exceed a gauge pressure of 8 psig (55 kPa).
- Where a means is provided to automatically shut off the oil supply if the pressure-regulating device provided in accordance with Section E 403.13(8) fails to regulate the pressure as required.
- Only appliances equipped with primary safety controls specifically listed for the appliance shall be connected to a centralized oil distribution system. [NFPA 31:9.2.10 — 9.2.15]
- No more than one 660 gallon (2498 L) tank or two tanks with an aggregate capacity of 660 gallons (2498 L) or less shall be connected to one oil-burning appliance.
- Two supply tanks, where used, shall be cross-connected and provided with a single fill and single vent, as described in NFPA 31 and shall be on a common slab and rigidly secured one to the other.
- Tanks having a capacity of 660 gallons (2498 L) or less shall be securely supported by rigid, noncombustible supports to prevent settling, sliding, or lifting. [NFPA 501A:4.4.6]
- A minimum of 25 gallons (95 L) per day per site for sites without individual water connections.
- A minimum of 50 gallons (189 L) per day per site for sites with individual water connections.
- A minimum of 50 gallons (189 L) per day per site where water-supplied water closets are provided in restrooms.
|MAXIMUM NUMBER OF RECREATIONAL VEHICLE STANDS SERVED||MINIMUM PIPE SIZES |