9.1.1.3 says "required to be protected against damage from earthquakes". No structure, no roof, no damage, no EQB.
Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, April 21, 2008 1:17 PM To: [email protected] Subject: RE: Seismic bracing of sprinkler pipng in exterior tank farm Pipe rack of 19 feet wide runs down between tanks. No supports for fire protection were provided. Support for rings around tanks are from adjacent 4" pipe stands standing approximately 30-35 ft high. Tanks are free standing on their own legs. We have water spray on the pipe rack verticals and horizontal members. Basically the fire protection piping receives no support from the vessel. To brace this would entail a first attachment to the pipe rack then sway bracing between the vertical pipe stands. How to do it isn't as big a deal as whether by code it is really necessary. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fletcher, Ron Sent: Monday, April 21, 2008 3:48 PM To: [email protected] Subject: RE: Seismic bracing of sprinkler pipng in exterior tank farm Structure? Are the pipe racks verticals not fire proofed. The pipe racks I have seen have supports every 20-25 feet so we used u-bolts or something similar. Vessels usually require pipe stands bolted to concrete pads or on separate concrete piers. For larger vessels we would attach to the exterior frame with rigid attachments and use maybe 18" standoffs to get the nozzle away from the vessel to achieve as much coverage as possible. Do the vessels have a structure around them? Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, April 21, 2008 11:33 AM To: [email protected] Subject: Seismic bracing of sprinkler pipng in exterior tank farm I have a tank farm with deluge sprinkler protection on the vessels, steel pipe rack and supporting steel. The debate that has arisen is whether this type of arrangement really needs to be seismically braced. The issue is that it is not a structure, and not occupied. However the materials within the tanks are flammable/combustible. Now to what degree of seismic resistance the structural steel and tank supports are designed to is unknown. Is there an exemption for this type of installation? Based on the information provided by structural, the occupied buildings would be braced, no question there. But for exterior vessels, that is the question. Soil Site Class = D Occ. Class. = I Seis. Des. Cat. = D Structure Ip = 1.0 but might be argued to be 1.25 (Occ. Class II) Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
