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HomeMy WebLinkAboutCA2022-27A 17 Mlav 2022 James Gravatt 840 East Texas Street Grapevine, Texas 76262 210-602-8429 A Future With A Past RE: HISTORIC PRESERVATION COMMISSION CERTIFICATE OF APPROPRIATENESS #CA22-27 1953 MAYOR H. M. COSNAHAN HOUSE #HL2010-09, ORDINANCE #2011-58 840 EAST TEXAS STREET GRAPEVINE, TEXAS 76051 JAMES GRAVATT, OWNER/APPLICANT This letter confirms on May 17, 2022 the Historic Preservation Staff approved with conditions #CA22-17 for the property addressed 840 East Texas Street, legally described as Block 5, Lot 6, D. E. Box Addition, City of Grapevine Texas. The following was approved on this Certificate of Appropriateness: 1. Install solar panels on the south facing roof of the Historic 1953 Mayor H. M. Cosnahan House with placement as per the attached plans and specifications; with the conditions the panels shall not be visible from the street view; panel color shall closely match the roof shingle color; all associated conduits and components to be painted to match roof, siding and wall color; and a permit be obtained from the Building Department. An approved Certificate of Appropriateness is not an approved building permit; a building permit(is / is not required. Contact the City of Grapevine's Building Department at 817.410.3165 for fees and information regarding permits. (Thank you, David Klempin Historic Preservation Officer wdk cc. Property Owner CA File THE CITY OF GRAPEVINE HISTORIC PRESERVATION - 636 South Main Street - Grapevine, Texas - 76051 - Phone 817/410-3197 Fax Number 817/410-3125 e- .. tr /!Q/br^' CERTIFICATE OF APPROPRIATENESS APPLICATION Date 5/17/2022 Number A ;2 2 Property Owner Name Address & Phone Number James Gravatt 84-Q-E-ex.19t Grapevine, TX 76051 Phone: Mobile: 817,938,2406 Email: Proa dress include any suite number I�A 5' i _ PtS22yzl �4n .Pis)aU1f. 7�( !/.,QriI Applicant Name Address & Phone Number same Phone: Mobile Email: Legal Description Block 5 Lot 6 Subdivision D E Box Ten nt amelOecup ncylUse i x5 _ I L_ : y Request/Description of Work to Be Done Install new solar panels DrawinastSketches Attached Photo ra hs Attached x Yes o No Current o Historic Material Sample(s) Attached (olease list) I hereby cer*, that this information is correct to the best of my knowledge and that the said work will be done in conformance wi,h all submissions herein set forth, and in compliance with the City of Grapevine's Historic Overlay District Ordinances and .Sudlmg Codes. APPROVAL F ��jjTIFICATE OF APPROPRIATENESS DOES NOT CONSTITUTE APPROVAL OF OTHER REQUIRED BUILDINOAJS. S or Office Use App,cared-; I g- t Approved with Conditions: S tal HPC u DC7 i-,d - H.sr7dc Fyeservat,on Commission au lfj rrj Oh cial Print Name James Gravatt Date 2rr rn T ( L) 17, , o'er' 2- THIS IS NOT A BUILDING PERMIT. V A SEPARATE BUILDING PERMIT MUST BE FILED AND APPROVED BY THE BUILDING DEPARTMENT BEFORE STARTING WORK. DELIVER TO: HISTORIC PRESERVATION DEPARTMENT OFFICE 817-410-3556 636 SOUTH IAAI14 STREET, GRAPEVINE, TEXAS ® CamScanner kc--4 2- 2- - Z 7 MLING Scoff E. Wyssting, PE Jon P. Ward, SE, PE Gregory T. Elvestad, PE 76 North Meadowbrook Drive Alpine, UT 84004 office (201) 874-3483 swyssf ing@ wysslingconsulting. corn February 16, 2022 Revised April 4, 2022 American Sun Solar 4801 Woodway Drive, Ste, 300 Houston, TX 77056 Re: Engineering Services Gravatt Residence 840 East Texas Street, Grapevine TX 10.000 kW System To Whom It May Concern: We have received information regarding solar panel installation on the roof of the above referenced structure. Our evaluation of the structure is to verify the existing capacity of the roof system and its ability to support the additional loads imposed by the proposed solar system. A. Site Assessment Information 1. Site visit documentation identifying attic information including size and spacing of rafters for the existing roof structure. 2. Design drawings of the proposed system including a site plan, roof plan and connection details for the solar panels. This information will be utilized for approval and construction of the proposed system. B. Description of Structure: Roof Framing: 2 x 6 dimensional lumber spaced at 24" on center Roof Material: Composite Asphalt Shingles Roof Slope: 23 and 18 degrees Attic Access: Accessible Lumber type: Assumed Douglas Fir Foundation: Permanent C. Loading Criteria Used © Dead Load o Existing Roofing and framing = 7 psf o New Solar Panels and Racking = 3 psf o TOTAL = 10 PSF • Live Load = 20 psf (reducible) — 0 psf at locations of solar panels ® Ground Snow Load = 5 psf • Wind Load based on ASCE 7-05 o Ultimate Wind Speed = 90 mph (based on Risk Category II) o Exposure Category C Analysis performed of the existing roof structure utilizing the above loading criteria is in accordance with the 2006 1RC, including provisions allowing existing structures to not require strengthenin ' the new loads do not exceed existing design loads by 105% for gravity elements and 11V seismic elements. This analysis indicates that the existing rafters will support the additional loading without damage, if installed correctly. 119��� MAY 0 6 2022 -' �Zz z � Page 2 of 2 D. Solar Panel Anchorage 1. The solar panels shall be mounted in accordance with the most recent "Sunmodo Solar Installation Manuar, which can be found on the Sunmodo Solar website (httpJfsunmodo.com/). if during solar panel installation, the roof framing members appear unstable or deflect non -uniformly, our office should be noted before proceeding with the installation. 2. Connection on the roof is utilizing (4) #14 screws into the existing decking to resist uplift forces. Contractor to verify installation to be performed in accordance with the Sunmodo recommendations. Pull out values per screw are based on National Design Specification values for CDX plywood and are identified as 208 lbs/inch. Based on'/" sheathing the value per screw would be 104 lbs providing 416 lbs uplift resistance per attachment. 3. Considering the roof slopes, the size, spacing, condition of roof, the panel supports shall be placed no greater than 48" o/c. Based on the above evaluation, this office certifies that with the racking and mounting specified, the existing roof system will adequately support the additional loading imposed by the solar system. This evaluation is in conformance with the 2006 IRC, current industry standards, and is based on information supplied to us at the time of this report. Should you have any questions regarding the above or if you require further information do not hesitate to contact me. 1/ truly yours, f Scott E. 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