HYDRAULIC CALCULATIONS

Hydraulic calculations are made for the both the administrative areas on the fourth floor of the facility and the main library area on the first floor. The fourth floor is a Light Hazard Occupancy and the requirements are summarized as follows. There are 8

sprinklers in the design area. There are 3 sprinklers per branch line. Here are the

sprinkler requirements for the first branch line. The minimum required discharge rate for each of the sprinklers are as follows:

Sprinkler 1: 20.0 gpm at 12.0 psi Sprinkler 2: 41.0 gpm at 24.8 psi Sprinkler 3: 65.4 gpm at 38.3 psi

97 According to NFPA 13, 23.4.2.1.1 Pipe friction losses shall be determined on the basis of the Hazen–Williams formula, as follows:

Figure 35: Pipe Friction Loss Equation

Please refer to Appendix B. The equivalent K-factor for the most remote branch line is calculated at 12.8. The K factor is calculated from NFPA 13 23.4.2.5 K-Factor Formula. K-factors, flow from an orifice, or pressure from an orifice shall be determined on the basis of the following formula:

Figure 36: K-Factor Equation

It is assumed that tees are used when there is a 90-degree change in direction so that the cross mains can be cleaned out rather than just an elbow.

The system demand at the BOR is calculated to be 116.0 gpm and 33.8 psi. The required flow and pressure at the point of connection (POC) to meet the required system demand is calculated to be 116.0 gpm and 36.2 psi.

Second, the hydraulic calculations are made for main library area on the first floor. Please refer to Appendix B for the hydraulic calculation sheet. There are 8 sprinklers in the design area. There are 4 sprinklers per branch line. Here are the

sprinkler requirements for the first branch line. The minimum required discharge rate for each of the sprinklers are as follows:

Sprinkler 1: 24.0 gpm at 18.9 psi Sprinkler 2: 48.4 gpm at 19.9 psi Sprinkler 3: 73.4 gpm at 22.1 psi Sprinkler 4: 99.7 gpm at 24.1 psi

According to NFPA 13, 23.4.2.1.1 Pipe friction losses shall be determined on the basis of the Hazen–Williams formula. The equivalent K-factor for the most remote branch line is calculated at 14.8. The K factor is calculated from NFPA 13 23.4.2.5 K- Factor Formula. K-factors, flow from an orifice, or pressure from an orifice shall be determined on the basis of the equation shown in Figure 36. The system demand at the BOR is calculated to be 146.8 gpm and 44.3 psi. The required flow and pressure at the point of connection (POC) to meet the required system demand is calculated to be 146.8 gpm and 47.1 psi.

WATER SUPPLY & DEMAND ANALYSIS

Figure 37: Hydraulic Supply and Demand Curve for NA893 Community Support Facility

Please refer to Figure 37 for the hydraulic supply and demand curve. A full-page version of the hydraulic supply and demand curve is located in Appendix C. As shown

99 on the hydraulic supply and demand curve, the static pressure is 69 psi and the residual pressure is 60 psi and the available flow is 890 gpm. The water demand is shown on the graph at 47.1 psi and 146.8 gpm with a 500 gpm hose stream requirement. The water demand is based on sprinkler demand requirements on the northern most room on the first floor, which has been classified as Ordinary Hazard II. These requirements were slightly higher than the northern most room on the third or

Although the available water supply is adequate to meet the demands of the existing sprinkler system as well as the total hose stream demand, the Building Standard Law of Japan requires a fire pump in this situation. According to the Building Standard Law of Japan, a fire pump, an emergency generator, and a water tank that can

accommodate the sprinkler requirement for the required duration, 90 minutes in this case, is provided since it is assumed that the water mains and power may be cut off during a seismic event. The fire pump, an emergency generator, and a water tank are a

redundancy and is a prescriptive requirement since the subject facility is a high population facility and since it is designated an emergency evacuation facility. INSPECTION, TESTING, AND MAINTENANCE

Since this facility will be designed and constructed by the Japanese Military of Defense by Japanese designers and contractors, the inspection and acceptance testing for this facility is different from just following the NFPA13 and relevant IBC sections.

During the design and construction of the facility, it should be noted that the facility must meet and pass the Japanese Fire Law. The acceptance and testing of the design documentation and construction turnover will be done in accordance with the Japanese Fire Law. However, since this facility will be designed and built on a US military base, it will have to follow US Federal regulations such as the NFPA and IBC as well as military regulations such as the UFC 3-600-01. The systems review and

acceptance will be performed by the Authority Having Jurisdiction (AHJ) in Japan who is the Fire Protection Engineer at the US Army Corp of Japan or at the Naval Facilities Far East.

This facility will require the design, review and oversight services of a Qualified Fire Protection Engineer (DFPE). A QFPE must be involved in every aspect of the design, construction and testing/commissioning as it relates to fire protection and life safety. This includes, but is not limited to, building code analysis, life safety code

analysis, design of automatic fire alarm, detection and suppression systems, water supply analysis, a multi-discipline review of the entire project, construction inspections and witnessing of fire protection acceptance testing/commissioning.

The design publications listed below should be used as sources of criteria for fire protection design. The criteria from these sources may be supplemented by applicable criteria contained in nationally recognized codes, standards, and specifications.

Government engineering publications are located in the Whole Building Design Guide website at http://www.wbdg.org.