HomeMy WebLinkAboutLA185150 - 21306 Isotope Tr 10.14.20ARC DESIGN
409 N. MAIN STREET
ELMER, NJ 08318
(856) 712-2166 FAX: (856) 358-1511
Construction Code Office
Date: October 6, 2020
Re: Roof Certification Letter
Subj: Plotz Residence, 21306 Isotope Trl., Lakeville, MN 55044
We have provided a review of the roof constructions of the above named property in regards to
verifying the capacity of the existing roof for installation of a new Solar Panel Array.
We have found the structure to be of wood frame construction. The Array is of 2x4 @ 24 truss
framed roof and is ext-ply sheathing and a single layer of asphalt shingles.
The wood framed roof structure bears directly upon the framed exterior wall system. The existing
members as installed meet the required IRC-2018 with 2020 MN amendments design span ratings with
sufficient capacity to carry the 4#/sf additional load imposed by the proposed solar array per the details
below.
Installation of solar rack systems shall be as follows:
Each panel row shall be supported upon 2 mounting rails. Rails shall be screw anchored
through roof and directly to rafters below.
Rail attachment points to rafters shall be staggered each row with exception to the first fastener
row from the gable end which is attached to two adjacent rafters.
A roofing compatible sealant or shingle flashing kit shall be utilized at each mtg. foot location.
Solar panel mounting systems installed parallel to the plane of a roof shall be no more than 12"
above the roof when measured perpendicular to the roof surface.
When installed per the above specifications the system shall meet the required 115 MPH wind load and
50 PSF ground snow load requirements.
Should you have any further question or comment please feel free to contact our office.
Respectfully,
James A. Clancy
Professional Engineer
MN License # 45968
DESCRIPTION:
PART NUMBER(S):
DRAWN BY:
SNAPNRACK, ULTRA RAIL COMP KIT
SEE BELOW
mwatkins Solar Mounting Solutions
THE INFORMATION IN THIS DRAWING IS CONFIDENTIAL AND PROPRIETARY. ANYREPRODUCTION, DISCLOSURE, OR USE THEREOF IS PROHIBITED WITHOUT THE
WRITTEN CONSENT OF SUNRUN SOUTH LLC.
595 MARKET STREET, 29TH FLOOR SAN FRANCISCO, CA 94105 USAPHONE (415) 580-6900 FAX (415) 580-6902B
REVISION:
MATERIALS:
DESIGN LOAD (LBS):
ULTIMATE LOAD (LBS):
TORQUE SPECIFICATION:
CERTIFICATION:
WEIGHT (LBS):
6000 SERIES ALUMINUM, STAINLESS STEEL, RUBBER
405 UP, 788 DOWN, 236 SIDE
2006 UP, 4000 DOWN, 1070 SIDE
12 LB-FT
UL 2703, FILE E359313; WIND-DRIVEN RAIN TEST FROM UL SUBJECT 2582
0.80
PARTS LIST
DESCRIPTIONPART NUMBERQTYITEM
SNAPNRACK, UMBRELLA LAG, TYPE 3, 4IN, SS242-9226611
SNAPNRACK, ULTRA FOOT FOR U FLASHING, SILVER / BLACK242-01219, 242-0122012
SNAPNRACK, COMP FLASHING, 9IN X 12IN, SILVER / BLACK ALUM232-01375, 232-0137613
3
1
2
2
DESCRIPTION:
PART NUMBER(S):
DRAWN BY:
SNAPNRACK, ULTRA RAIL COMP KIT
SEE BELOW
mwatkins Solar Mounting Solutions
THE INFORMATION IN THIS DRAWING IS CONFIDENTIAL AND PROPRIETARY. ANYREPRODUCTION, DISCLOSURE, OR USE THEREOF IS PROHIBITED WITHOUT THEWRITTEN CONSENT OF SUNRUN SOUTH LLC.
595 MARKET STREET, 29TH FLOOR SAN FRANCISCO, CA 94105 USAPHONE (415) 580-6900 FAX (415) 580-6902B
REVISION:
ALL DIMENSIONS IN INCHES
11.75
3.25
8.75 .45
6.75
1.00
4.20
.30
3.25
1.00
1.00SLOT
1.50
2.781.78
1.50
.38 .30
1.37
1.62
UMBRELLA L FOOT PROPERTIES
SKU DESCRIPTION
242-01219 ULTRA RAIL UMBRELLA L FOOT, SILVER
242-01220 ULTRA RAIL UMBRELLA L FOOT, BLACK
COMP FLASHING PROPERTIES
SKU DESCRIPTION
232-01375 COMP FLASHING, 9" X 12", BLACK ALUM
232-01376 COMP FLASHING, 9" X 12", SILVER ALUM
.35
1.80
105°
DESCRIPTION:
PART NUMBER(S):
DRAWN BY:
SNAPNRACK, UR-40 RAIL
232-02449, 232-02450, 232-02451
mwatkins Solar Mounting Solutions
THE INFORMATION IN THIS DRAWING IS CONFIDENTIAL AND PROPRIETARY. ANYREPRODUCTION, DISCLOSURE, OR USE THEREOF IS PROHIBITED WITHOUT THE
WRITTEN CONSENT OF SUNRUN SOUTH LLC.
595 MARKET STREET, 29TH FLOOR SAN FRANCISCO, CA 94105 USAPHONE (415) 580-6900 FAX (415) 580-6902B
REVISION:
MATERIALS:
DESIGN LOAD (LBS):
ULTIMATE LOAD (LBS):
TORQUE SPECIFICATION:
CERTIFICATION:
WEIGHT (LBS):
6000 SERIES ALUMINUM
N/A
N/A
N/A LB-FT
UL 2703, FILE E359313
5.85
OPTIONS:
CLEAR / BLACK ANODIZED
MILL FINISH
BUNDLES OF 144
BOXES OF 8
ALL DIMENSIONS IN INCHES
UR-40 RAIL
PROPERTIES
SKU FINISH
232-02449 MILL
232-02450 CLEAR
232-02451 BLACK
1.624
1.500
CENTROID
.750
.832
.792
EQUIVALENT PROPERTIES
A 0.357 in²
Ixx 0.125 in
Iyy 0.132 in
Sx (TOP)0.150 in³
Sx (BOT)0.158 in³
Sy (LEFT)0.175 in³
Sy (RIGHT)0.175 in³