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1. This is a "SPEC" warehouse where the design has anticipated 200 gpm in-rack sprinkler allowance, which was taken off prior to entering the building as a hose allowance? Reverify the calculations with the demand located at the anticipated location off the riser and resubmit for a correct hydraulic verification. (BMC 7-01-50-901.2, IFC 105.4.2)
2. Fire sprinklers shall be positioned with respect to branch lines to be offset horizontally a minimum of 12" from the pipe, or be supplied by a riser nipple to elevate the sprinkler deflector a minimum of 13" from the centerline of 2½" pipe. Revise and resubmit. (NFPA 13-8.11.5.2.2)
3. It is understood (Stan Beus) that underground permit FIR05-00464 has some field modifications, either made or found. The existing tap is 6". Provide United Water supply piping which shall include size of city main in street and whether dead end or circulating; if dead end, direction and distance to nearest circulating main, and system elevation relative to test hydrant (see A.15.1.8 Include and provide these modifications by resubmittal incorporating them in this permit, which shall include connection at the tee and not the gate valve as shown on FP1. (BMC 7-01-50-901.2, IFC 105.4.2, NFPA 13-14.1.3[10])
4. Trapeze hanger shall be engineered and addressed on the plans, relating and corresponding to the location, size of main/line, etc., by the designer as addressed in 14.1.3(22) and required per IFC 105.4.2, BMC 7-01-53-903.1.3. Trapeze hanger detail shall clearly address engineering matching this projects structural design. It is not field installer responsibilities to determine the engineering of such hangers since many do not have that capability, information or education to field determine minimum trapeze hanger requirements.
a. Identify the actual span (scaled, it exceed 7'-0"), and pipe using in the trapeze hangers for the 6" cross mains on the plan. The pipe schedule (10 or schedule 40, etc.) incorporating shall also be addressed on the plan.
b. Designer is incorporating 2 hangers on each end of a rod connected to the trapeze, (what is addressed as: "Double Ring Hanger assembly"). Identify the rod size (9.1.2.1). Identify the hanger size/type on both ends of the rod (9.1.1.6.5). Address how that hanger on the top of the rod will be retained from slipping (9.1.1.6.4) on the trapeze, on the plan.
c. The trapeze is spanning two trusses with hangers located at what appears to be at a maximum allowed spacing (9.2.2.1). Has the designer verified with the structural engineer, that maximum spacing is acceptable for the trapezed, parallel 6" mains? It shall be the installers/designers responsibility to verify structural acceptance loads at these supporting points, on structural members (trusses).
(BMC 7-01-50-901.2, 912.2.1.1, IFC 104.7.2, 105.4.2, 912.2.1, NFPA 13-14.1.3[10], 14.1.3[22], IBC 1604.3, 1604.4)
5. Pipe type and schedule of wall thickness shall be addressed on the plans. Include fitting types used off the main, connecting to the riser, top of risers connecting to schedule 10 lines. (NFPA 13-9.3.3*, A.9.3.3, A.9.3.2, 14.1.3 [18, 21])
6. Plan FP1, riser has a side note addressing a 2.5" forward flow is sufficient and the riser detail key notes address a 4"butterfly valve on a 4" bypass in the FDC?. Correlated a correct design intention on the plan. (BMC 7-01-50-901.2, IFC 105.4.2)
7. Electrical room #101 is overspaced for OH occupancy protection. Reference NFPA 8.5.2.1.2 on how protection area of coverage is derived.
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