3020 RUCKER AVE SNO CO HEALTH DISTRICT 2020-01-30

, t Additional information for 3020 Rucker replacement: Units 1-5 RTU's Old units weighed 575 lbs 37 New units weigh 3 4 lbs(221 lbs each less-removing a total of 1,105 lbs off the roof) These units are attached with factory engineered clips-Submittal included in package.These clips are made to work with 3 to 10 ton RTU's-these units are 3 ton.They are attached using submittal information or better and 4 for each unit. Units 6-19 Splits to City Multi. Old units weigh 297 lbs each (13) new units weigh 526Ibs each (X4) Equipment numbering refers to the 13 splits being replaced. Each set of units replace between 6 and 7 splits.These units provide simultaneous heat and cooling and fresh air to 13 heads. Units are mounted on 4X4 pressure treated shoring, secured to the roof structure (old equipment is not secured)with 318th" bolts-length depending on roofing structure.Shoring is then capped with galvanized "hats"to provide additional protection and longetivity.The units are replacing where we are removing 4 compressors-the new units weigh 136 lbs less than what we are removing from that location.An additional 1,485 lbs are being removed from the roof and not being replaced. Units 20&21 Gas fired make-up air-replaced with 10 ton Trane Gas heat with A/C and demand ventilation. VO I Engineered by the Harris group. New units weigh @ 5,01 lbs more than units being removed and will be place on PT shoring(per engineering) -additional load is supported by existing roof framing. Units will be secured to roofing structure with 318th' lag bolts into roofing structure.Old units were designed for 2,215 CFM of outside air(OSA) each, new units can provide 2,560 CFM of OSA and rather than using the prescriptive number of 2,215 we are providing controls to provide demand ventilation based on Co2. The old units were ineffective once the roof exceeded 80 degrees and was turned off-the new system can provide heating and cooling allowing the system to work all year around. �f