Need hydraulic calcs for the dormer areas

mike; Phone #: ###-#### Internet Inspection Request from: Cathy Chiles

No time for this inspection today, spoke with Mike from TV to schedule for monday 9/12 per our agreement.

Begin 24 hour air test of the dry system at 1:55 p.m 8/23/05 at 42psi.

Sprinkler piping in new addition is ok to cover.

See city approved plans for locations of deficiencies. Lower system south end not installed yet. Hydro test passed but was only partial test.

called left message for gerald permit is ready and fees

1. Manufacturer data submittals are missing. No data submittals provided on the Reliable Model "F3QR", Q.R., SSP, D.P., 5.6 K-factor, R5714 sprinklers, of which 13 are addressed as being installed in this facility.
2. Manufacturer data submittals are missing. No data submittals provided on an air compressor/supply and regulating appurtenance. Where a dry pipe system is supplied by an automatic air compressor system and any device or apparatus used for automatic maintenance of air pressure shall be of a type specifically listed for such service. If more than one is listed in the documents, identify the exact related one incorporating. (BMC 7-01-50-901.2, NFPA 13-7.2.6.6.1)
3. It was found that a dry pendent (possibly more which were addressed) is installed on a drop nipple (see following reference location). Limitations are included in product installation instructions for potential accumulation of scale and sediment building up at the sprinkler when installed on a drop nipple. This installation practice is not accepted since corrosion/sediment would fall into the drop nipple piping and affect the required flow/pressure of the dry pendant sprinkler operation.
4. The designer incorporating the wrong purpose, usage and installation design of a "Return Bend". The purpose of return bends, (covered under 8.14.18.1 through 8.14.18.4) is to prevent collection of scale and sediment from normal scale and sediment from corrosion in being pushed into the drop nipples, which developed from normal environmental moisture trapped in dry piping that, can plug or affect normal sprinkler operation flows/pressures. Return bends shall not be taken off the bottom of branch lines or mains. Also "Armovers" on any kind of riser nipple is not a "Return Bend", but would be considered a "Swing Joint", if exceeding some degree of pipe length, (the higher possibility of accumulated scale/sediment build up). This AHJ will allow the use of return bends to be within the limit of 2'-0" length (the standard requirement for a hanger). Any length of piping exceeding that length (measured center to center) will require a return bend on the down elbow to the pendent head! Remember, pendent sprinklers installed on return bends only permitted where both the sprinklers and the return bends are located in a heated area. (Reference NFPA 13- 8.14.18)
5. Foyer A101 (plan FP-2, Lower Reflected Ceiling detail) will require head adjustment to allow for fire sprinkler coverage of all walls. Red-lined on plan.
6. The Existing Sanctuary Lower Level piping designed are proving a density of .10 over 225 ft/2 per head, yet the actual PIPE spacing input in the calculations is averaging 140 ft/2? The conflicting input procedure does not provide accurate friction loss (C-factor and velocities) data in the calculation analysis report and is unacceptable form of calculating for an area/density maximum spacing! This area shall be installed exactly as shown and no spacing allowed exceeding 140-ft/2 allowed for these pendant heads or reverification shall be provided. (NFPA 13-8.5.2.1, 14.4.4.3.3, 14.4.4.5, and 14.1.3 [34]).
7. In this review, construction information is lacking relating to the uprights in this Lower Piping Existing Sanctuary cavity. With lack of construction information, the upright cavity sprinkler coverage will be limited to 130-ft/2 maximum spacing per NFPA 13-8.6.2.2.1(a) or corrected and detailed information shall be provided.
8. Outside control shown on FP-2, but no outside control is shown or provided on the on the riser? Provide corrected plans addressing this BMC 7-01-53, 903.1.3 requirements.