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HomeMy WebLinkAboutB13-0395 PLANS APPROVEDB13-0395 RADER1 ENGINEERING • COMFORT SYSTEMSM PO BOX 8610 • AMOR 00 816M • Telephone 970484,x7910 Fax 9705457522 • E4nsil dader@aderercjneering.com 9/17/13 Justin Nielsen Skyline Mechanical P.O. Box 1258 Gypsum, CO 81637 justin(&skkylinemechanical.com RE: Vail's Front Door, Vail, CO New Chimney Cap at Boiler Flue Chase Justin, It is our understanding that there is excessive ice build -up at the existing boiler flue chimney cap. This is being caused by the fact that the cap is hemi cylindrical in shape (inverted U) and is thereby trapping flue gases. The trapped flue gases are causing ice build -up and also corroding the copper metal. See page 2 below for image. It is our understanding that Skyline is proposing to replace this chimney cap at the boiler chase with a new open top type chimney cap, as shown on page 3 below. The cap will be made entirely of steel and will be powder coated for corrosion resistance. The proposed chimney cap will be consistent with the other chimney caps on the building, and per the original architectural drawings (sheet A525). Rader Engineering approves of the proposed design. It has been our experience that an open top chimney cap is the best method for concealing power vented boiler flues, while also allowing the flue gases to be discharged straight vertically unimpeded into the atmosphere. We recommend that the existing flues be extended vertically so that the top of the flue pipes are 3" higher than the top of the chimney cap structure. Please call with any questions. Sincerely, L/ Bryan J. Houle, P.E. r0 , N . O(i F :• 46 9/17/13 3 9 . • �v .o .� to S70N A t- EN RECEIVED By DRHOADES at 1:16 pm, Sep 26, 2013 9/17/13 Vail's Front Door Page 1 of 3 Existing Chimney Cap to be Removed (note corrosion) 9/17/13 Vail's Front Door Page 2 of 3 Suggested structural frame for Chalet Chimney cap replacement r Existing Post X4 //,, 7-- EL n.,. op o tom yp Post X4 1 " Tube Steel frame with Corrosion Resistant powder coat finish d Kexisting vertica of flue ' to — Flues shall extend no higher than 1" below the top of the cap. Cap will be cladded in copper to match existing chimneys on the building. Proposed Chimney Cap at Boiler Flue Chase 9/17/13 Vail's Front Door Page 3 of 3