1869 SEA OATS DR SOLR23-0008 - STRUCTURAL PLANS
76 North Meadowbrook Drive
Scott E. Wyssling, PE Alpine, UT 84004
Coleman D. Larsen, SE, PE office (201) 874-3483
Gregory T. Elvestad, PE swyssling@wysslingconsulting.com
November 7, 2023
Lumio Solar 12600 Challenger Parkway, Suite 200 Orlando, FL 32826
Re: Engineering Services Klein Residence
1869 Sea Oats Drive, Atlantic Beach FL 6.000 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 framing 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: Prefabricated wood trusses at 24” on center. All truss members are constructed of 2 x 4 dimensional lumber.
Roof Material: Composite Asphalt Shingles Roof Slopes: 22.62 degrees Attic Access: Accessible 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
• 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 = 0 psf
• Wind Load based on ASCE 7-16
o Ultimate Wind Speed = 140 mph (based on Risk Category II)
o Exposure Category B
Analysis performed of the existing roof structure utilizing the above loading criteria is in accordance with the FBC 2020 7th Edition, including provisions allowing existing structures to not require strengthening if the new loads do not exceed existing design loads by 105% for gravity elements and 110% for seismic elements. This analysis indicates that the existing framing will support the
additional panel loading without damage, if installed correctly.
Digitally signed by Scott Wyssling, PE
DN: C=US, S=Utah, L=Alpine,
O=Wyssling Consulting,
OU=Engineering, CN="Scott Wyssling,
PE",
E=swyssling@wysslingconsulting.com
Reason: I am the author of this
document
Location: your signing location here
Date: 2023.11.07 10:20:41-07'00'
Foxit PDF Editor Version: 11.1.0
Scott
Wyssling,
PE
JOB COPY
Page 2 of 2
D. Solar Panel Anchorage
1. The solar panels shall be mounted in accordance with the most recent Unirac installation manual. If during solar panel installation, the roof framing members appear unstable or deflect non-uniformly, our office should be notified before proceeding with the installation. 2. The maximum allowable withdrawal force for a #12 lag screw is 176 lbs per inch of penetration as
identified in the National Design Standards (NDS) of timber construction specifications. Based on two screws with a minimum penetration depth of 1 ¼”, the allowable capacity per connection is greater than the design withdrawal force (demand). Considering the variable factors for the existing roof framing and installation tolerances, the connection using two #12 lag screws with a minimum
of 1 ¼” embedment will be adequate and will include a sufficient factor of safety. 3. Considering the wind speed, roof slopes, size and spacing of framing members, and condition of the roof, the panel supports shall be placed no greater than 48” on center.
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 FBC 2020 7th Edition, current industry standards and practice, 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.
Very truly yours,
Scott E. Wyssling, PE Florida License No. 81558
Florida COA No. RY34912
Date Signed 11/7/2023
1'-5"22'-10"17'-3"6'-11"
9"ROOF 1FRONT OF RESIDENCE
BACK OF RESIDENCE
EXISTING SYSTEM
(N) UNIRAC NXT HORIZON RAIL(N) UNIRAC STRONGHOLD BUTYL3R3R3E3E2N2N2E12RKARL KLEIN
RESIDENCE
PROJECT #: P-0088870
1869 SEA OATS DRIVE
ATLANTIC BEACH, FL, 32233
METER #: 20194409SHEET NUMBERSHEET TITLELOCATIONDRAWN BY:DATE:REVISIONSREVDATEDESCRIPTIONLUMIO HX INC 1550 W DIGITAL DRLEHI, UT 840431 (888) 586-4649LIC #: EC13011870A.A.10/12/23DESIGN SPECIFICATIONRISK CATEGORYIICONSTRUCTIONSFDZONINGRESIDENTIALSNOW LOAD (ASCE7-16)0 PSFEXPOSURECATEGORYBWIND SPEED (ASCE7-16)140 MPHNATTACHMENTPLANS001ROOF PLANSCALE: 1/8" = 1'-0"#115905/12 (22.62°)2X424"O.C.COMPSHINGLEARRAY DESCRIPTIONROOF# OFMODULESAZIMUTHTILTTRUSSSIZETRUSSSPACINGROOFMATERIAL Date Signed 11/7/2023 Reviewed for codecomplianceCEP BU169911/07/2023 8:25:27 PM