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Catch Design Studio <br />1405 Boylston Ave <br />Seattle, WA 98122 <br />P# 206-322-4323 <br />FRYING LEMON FISH <br />Correction Letter Response: <br />Review Type Structural <br />Date: Oct 5 2021 <br />EMAIL: <br />From: Drew Martin <br />Sent: Monday, March 2, 2020 3:19 PM <br />To: 'rochelle@catchstudio.com' <rochelle@catchstudio.com>; 'nos@catchstudio.com' <br /><nos@catchstudio.com> <br />Subject: City of Everett Permit Services: 2621 Rockefeller Avenue (131912-029) <br />1. The weights of the new RTU-1 and suspended heater should be listed in the <br />drawings. Note that the building drawings indicate that heater as existing, but the <br />mechanical drawings state it as new. <br />The weight of the new RTU and suspended heater were listed in previous <br />calculation. On this set of submittal, all the new mechanical weights are <br />listed on the 1st page of calculation. Note that the suspended heater was <br />eliminated by the owner, and the new RTU is to replace existing unit. <br />2. The calculations for the joists supporting the RTU-1 include a dead load of 50 <br />lbs. Per the schedule, the unit appears to weight at least 200 Ibs, not include <br />other components (e.g., curb, etc.). The unit weight is spread to three joists, but <br />still appears higher than considered in the calculations. The joists supporting the <br />RTU-1 also support other equipment (e.g., roof top fans, Type 1 hoods below), <br />but these are not included in the analysis. Note that the analysis indicates the <br />joists are slightly overstressed; the additional loading will increase the level of <br />overstress. Revised calculations should be submitted. <br />