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Home My WebLink AboutFIREWALL PLANS - 07-00560 - Premier Powder Coating - RemodelNovember 2, 2007 Val Christensen, Building official 12 North Center P4 Bax 281 Rexburg, ID 83440 Re: 328 North 2"d East {old John Deere building} Val* Rowmvzm COA'x'"1 ' ' & Ciflaq"r . X"A 1= MF J14-* A te , AL r 07 0056"U"-% Premier Powder Co2ting Flolreall 328 N 2nd E -A. ER' ' QATEU. Ea�-ti We are evaluating the possibility of leasing the back portion of the subject building. Since the front portion is bein� leased b Custom Auta (BVI occupancy} and our Proposed op�ratiflns would fall, under the S-1 occupancy, the separation between the Y tenants is required to have a fire resistance rating of 3 hours,.' The purpose of this letter is to provide the technical justification fo.r the attached design to upgrade the existing separation wall. The -building codes contain provisions by which the fire resistance of specific materials or combinations afmaterials is estat�lished by calculatian.2�'�4. Such provisions were included for "instances when materiats and assemblies in a building undergoing rehabiIi�ation cannot be found in the Appendix Tables". � The existing separation walI in the subject building is just such an instance. Consequently the data and procedures in the respective odes have been used to determine the desin required. to upgrade the existing separation wall to a 3 Baur fire resistance rating. g The following sources were used to calculate the nr�inimum fire resistance rating of the individual layers in the design, Using Rile 1 of Harm_athy's Rules (referenced in the IEB+C) it can be concluded that the final built assembly wi11 have a fire resistance rating greaten- than the sum of the fire resistance ot'the individual layers.5 T need your concurrence with this approach so, that J can get an estimate for the buZIding permit. Sincerely, Craig . porter Business Manager Attachment: Proposed modification tO an existing wall '2003 International Building Code, Table 302.3.2 2003 JBC, Section 721 Calculated Fire Resistance 3 2003 International Existing Building Cade, Resource A 4, 3.2 The 'Tbeoretical Approach 2003 IBC Sect -ion 743.3 Alternative methods for determining fire resistance. T.Z. Harmathv in t1,P mat, 1 arc 14' +; ire i ecnnology- .1 1 c w i n(i L A Dl0.1f m----� E _4 Lg WM vvest Kexburg, ID 83440 (208) 356 -3263 - (Office) (208) 359-5325 (Fax) www.PPCCFab.com D 4% Upgrade of existing wall to a fere resistance rating of 3 hours Location: 328 North 2°d East, Rexburg, ID 83440 Existing wall is 2") x 4`5 wood stud wall on 16 centers with void space filled with glass fiber mineral wool insulation. Each wall is finished with a wood stz-uctural paneling that is greater than %z". Existing 2 5'x 417 wood. studs faced with wood panels 2layers of 518" Type X gypsum wallboard with joints offset. Fire resistance rating off'ir��.�vidual members: 518" Type X gypsum wallboard 518" Type X gypsum wallboard Existing assembly w1 insulation SIS" Type X gypsum wallboard 5/8"' Type X gypsum wallboard Sum of Individual ratings: 44 minutes 40'rmnutes 35 minutes 40 minutes 40 minutes 195 minutes Glass fiber mineral wool insulation POWDE)e-M 7M COATING & CUSTOM',FABRIO ArIG� Request for Quote Sca eof work,, 0 'Apply twos layers of 5/8" Type Separates tenants in the building located at 328 Pegboard on the Custom Auto side will need after instaflation. Final layer will need to be offset by 24a, I t� X sheetrock over both sides of an existing wall that North 2"A East, Rexburg, ID the old John Deere store), 10 be removed before finished and painted, Existing 2"' x 4" wood studs faced with wood panels 2 layers of 5/8" Type X gypsumwallboard with j oints o ffs et. & Cvnta�t for access to rear porton of building for walkdown. Front v,911 can be v.�ewed during noxrnal business hours 01 Custom Auto. the sheet -rock is applied and reinstalled Joints on multiple layers should be Glass fiber mineral wool insulatian Fax quote to 359-5325 or email to crai.Ra,,DDCCfab.00M Work to be done as soon as building permit is approved. 115 N. 2n' West Rexburg, ID 83440 (208) 356-3263 (Office) (208) 359-5325 (Fax) www-PPCCFab.,corn RO .0 R.'- W -E -Cb-A.-t I t� X sheetrock over both sides of an existing wall that North 2"A East, Rexburg, ID the old John Deere store), 10 be removed before finished and painted, Existing 2"' x 4" wood studs faced with wood panels 2 layers of 5/8" Type X gypsumwallboard with j oints o ffs et. & Cvnta�t for access to rear porton of building for walkdown. Front v,911 can be v.�ewed during noxrnal business hours 01 Custom Auto. the sheet -rock is applied and reinstalled Joints on multiple layers should be Glass fiber mineral wool insulatian Fax quote to 359-5325 or email to crai.Ra,,DDCCfab.00M Work to be done as soon as building permit is approved. 115 N. 2n' West Rexburg, ID 83440 (208) 356-3263 (Office) (208) 359-5325 (Fax) www-PPCCFab.,corn