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Alternate Material(s) and/or Method(s) Application <br /> iiMarion County Public Works <br /> V nil lorr 5155 Silverton Rd NE <br /> Couur, Salem OR 97305 <br /> OREGON <br /> Phone: (503)588-5147 Fax:(503)588-7948 E-mail: Huddle_dco.manon.or.us <br /> DESCRIBE WHY,HOW,ETC.,THE PROPOSED ALTERNATE IS EQUIVALENT AND MEETS THE <br /> INTENT OF THE CODE IN TERMS OF"STRENGTH,EFFECTIVENESS,FIRE RESISTANCE, <br /> DURABILITY,HEALTH,AND SAFETY": <br /> There are two turbine ventilator access doors and a small air conditioning unit located on the roof at Grid AC. There is 23 <br /> inches of roof space between the units and a low parapet. Beyond the parapet is a lower roof(approximately 5'lower). <br /> We have investigated adding a railing at this location as requested by TCO and found the following;The roof parapets <br /> are low and are not designed to accommodate railing support anchorage;Anchoring to the roof slab would decreases <br /> worker safety by encroaching into the access zone;This would reduce the amount of space available to access the units. <br /> Roof tie-offs are an alternate method, enhanced safety system,exceeding the code requirements. To ensure worker <br /> protection Chemeketa Community College will take the following steps:1. Provide 2 harnesses with safety leads to be <br /> stored in Mechanical Room 9-235(2050)at the roof access ladder.2. Provide slgnage at the roof stair to wear safety <br /> harness connected to root tie-of(when working at all areas within 10 feet of the roof edge.3. Provide training to <br /> Chemeketa maintenance workers on the use of safety harness and roof tie-off procedures. <br /> LIST SUBSTANTIATING EVIDENCE(REPORTS, STUDIES,ETC)-ATTACH COPIES OF DOCUMENTATION <br /> Alternative safety system allowed under Oregon Mechanical Specialty Code 105.1:Alternative material, methods, _ <br /> equipment and appliances. To be approved as installed, a roof tie off provides an alternate,enhanced safety system, <br /> exceeding the requirement of 2007 Oregon Mechanical Specialty Code 304.11 <br /> I hereby request approvakt6 a an alternate material(s)and/or method(s)from that required by code as described above. <br /> Signed: " ( j., t i ;c—> Date: 2.4 • Z.L t U. <br /> J <br /> OFFICE USE^^ ONLY <br /> ❑ Approved iro1 DSc"c-F d O eS Ao't- frburcte C'9ttri✓a leaf- <br /> 0 Approved with conditions IN✓€ i of C. oralec Frvn / <br /> '.Denied ///�//j�� I <br /> Signed: l� �,t _ Date: CO AP/J-O// <br /> Page 2 of 2 <br /> G;FORMS1BLDG\13-37Altanate Material or Method Requaetdac <br /> 4 <br />