Agenda - 10-03-1977 - Laserfiche WebLink

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AGENDA ATTACMENL I I I J A M E S M . W rZ B R , A . i . A . - A . 1 . P . A p C H 1 T E C T & P L A N N E R h5EMBER AMERICAN INSTITUTE OF ARCHITECTS AND AMERICAN INSTITUTE of MANNERS 201 EAST ROSEMARY 5T. September 26, 1977 CHAPEL HILL, N. C. 2751A T E L E P H 0 N E 9 2 9 5 3 8 5 Mr S. M. Gattis Orange County Manager Re: Project No. IBC-MH-36 Hillsborough, N. C. 27278 Center for orange-Person-Chatham Mental Health Program, Chapel Hill, N. Dear Mr Gattis: This letter. is written to recommend for consideration by yofun d t e County as Commissioner's at your earliest convenience of approval r . t ,.ands not included under bid as Alternate G-3 Chan�,e Order �'o. � of the replacement sash, previously the General Contract but, because of insuffi,cien > recently let to Triad, General. Contractor, for construction of the pPC Mental Health Center. As you may recall the County Commissioners during the early stages of Design Development expressed a strong interest in considering all. possible energy saving measures. As a consequence l was instructed to have ouro consulting be in- mechanical engineers evaluate all practicable measures that might echanical into this building. of these measures turn of the most important corporated involved the treatment of the exterior window areas. The existin; windows are single glazed commercial type steel sash, all of which have had the glass broken out of them. The present contract calls for re,�glazi.ng these with single pane glass and making whatever repairs may be necessary for proper operation. Only single pane glazing p since insulating glass would be too thick to fit the old frames. However, "Cool Shade" screens to deflect the rec a bleuenergyrsavinghfor summeracool- been, provided, thus effecting pp ing loads. The design. capacity of the cooling system is based an this re- duced load. However, this does noCNin , for n spiteio€ winter cold have and consequent meat loss. The heating system, in spite sufficient capacity to heat the building adquately with the old windows since it' i.s essentially the original heating system, improved and re-used. The proposed change order provides for the removal of all the. old steel. sash and the installation of high quality insulating aluminum sash. Not only the glazing of insulating glass (tiro thicknesses with air space ial construction between) but also the frames in contrast t to spe exist sting steel sash which an efective thermal barrier o osed windows not only do not provide such a barrier. Thus, these pr' P