23A-080 (4) Vreeland Design Associates
An integrative approach to design engineering and site planning
Date: October 16, 2014
To: Ann Bronner
NorthEast Solar
136 Elm Street
Hatfield, MA 01038
From: David Vreeland,P.E.
Vreeland Design Associates
Re: Coopers Corner, 31 Main St, Florence, MA: Final report for the structural reinforcement of
the existing roof framing over the older original building supporting the installed solar array.
I have conducted several site visits during the installation of the ballasted solar array,the necessary
reinforcement of the existing 2x10 rafters supporting the array, see stamped letter dated June 24,
2014, and the installation of the steel reinforcing over the 2nd floor east office window, see stamped
reinforcement detail dated August 5, 2014. All the necessary reinforcement has been completed and
is adequate to support the installed solar array.
Please contact me if you have any questions or need additional information.
Sincerely,
•�, �,/ ��� �o� DAVID A.
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David Vreeland, PE U No.463 0 4 63 ti
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Vreeland Design Associates
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116 River Road, Leyden, MA 01337 Phone: (413) 624-0126
Email: dvreeland @verizon.net Fax: (413) 624-3282
Vreeland Design Associates
An integrative approach to design, engineering and site planning
Date: August 5, 2014
Re: Coopers Corner: Steel reinforcement over 2nd floor east office window.
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Email: dvreeland@verizon.net Fax: (413) 624-3282
Vreeland Design Associates
An integrative approach to design engineering and site planning
Date: June 24, 2014
To: Ann Bronner
NorthEast Solar
136 Elm Street
Hatfield, MA 01038
From: David Vreeland, P.E.
Vreeland Design Associates
Re: Coopers Corner, 31 Main St, Florence, MA: Structural assessment of existing roof framing
over the older original building to support proposed solar array.
On January 13, 2014, I conducted a site visit and investigated the existing roof framing of the
original store. The existing rafters are 2x10 installed at 24" on-center, spanning 15'-4", supported
on W 14x43 steel beams that span 27'. The proposed solar array will use the Ecofoot2 ballasted
modular rack system from Ecolibrium Solar with the panels oriented perpendicular to the direction
of the existing rafters. The Ecofoot2 and the proposed ballast is rated for 100 mph basic wind
speed. The ballast, 4"x 8"x 16" concrete blocks fit in trays that are attached to the racks. The
ballast trays are located approximately 3'-4"on-center parallel to the rafters and 7'-0" on-center
perpendicular to the rafters. The rafters that support the ballasted rack system will need to be
reinforced with an additional 2-3 - 2x10s sistered to the two nearest rafters that are found to be
located under the ballast trays. To allow for flexibility to install the ballasted rack system around
the existing obstacles on the roof, I recommend that the rack system be installed in the desired
configuration, contact me before the installation of the solar panels, and I will conduct a site visit
to assess the actual installation to determine the reinforcing requirements for those rafters that are
actually supporting the installed array. I will then provide you a stamped letter certifying that the
installed reinforcing is adequate to support the installed array that you can forward to the Building
Inspector. The existing W 14x43 steel roof beams are adequate to support the proposed solar array.
Please contact me if you have any questions or need additional information.
Sincerely,
,kk OF N4
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VREELANO
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David Vreeland, PE No.46317
Vreeland Design Associates GISTEQ�A�cc
�SSIONALU�
116 River Road, Leyden, MA 01337 Phone: (413) 624-0126
Email: dvreeland @verizon.net Fax: (413) 624-3282
Vreeland Design Associates
An integrative approach to design engineering and site planning
Date: May 28, 2014
To: Ann Bronner
NorthEast Solar
136 Elm Street
Hatfield, MA 01038
From: David Vreeland, P.E.
Vreeland Design Associates
Re: Coopers Corner, 31 Main St, Florence, MA: Structural assessment of existing West Rear
Truss Roof Addition to support proposed solar array.
On May 15, 2014, I conducted a site visit and investigated the existing truss roof framing of the
west rear addition constructed around 1985 to the original store. I have reviewed the plans
prepared by Gillen, Kuhn, Riddle & Gray, the architectural firm that prepared the plans to confirm
the roof framing details. The existing roof framing are 2x6 gable roof trusses installed at 24"on-
center, spanning approximately 42', with an approximate 2/12 pitch.
I have reviewed the mounting details for the proposed array. Based on a PV panel unit weight of
approximately 40 lbs, with the attachment points of the array placed at a maximum of 4' on center
and staggered to minimize the load to any one roof truss, the existing truss roof framing is
adequate to support the proposed PV array.
Please contact me if you have any questions or need additional information.
Sincerely,
f ytH OF A(4sscti
DAVID A.
VREELAN
David Vreeland, PE U CIVIL y
Design Associates .
Vreeland Desi Aiat0 No'4317
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116 River Road, Leyden, MA 01337 Phone: (413) 624-0126
Email: dvreeland @verizon.net Fax: (413) 624-3282
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Vreeland Design Associates
An integrative approach to design engineering and site planning
Date: January 14, 2014
To: Ann Bronner
NorthEast Solar
136 Elm Street
Hatfield, MA 01038
From: David Vreeland,P.E.
Vreeland Design Associates
Re: Coopers Corner, 31 Main St, Florence, MA: Structural assessment of existing Addition
roof to support proposed solar array.
On January 13, 2014, I conducted a site visit and investigated the existing roof framing of the
addition constructed in 1985 to the original store. I have reviewed the plans prepared by Gillen,
Kuhn, Riddle & Gray, the architectural firm that prepared the plans to confirm the roof framing
details. The existing rafters are 2x10 installed at 16" on-center, spanning 13'-4", supported on
W10x19 steel beams that span 14'.
I have reviewed the details for the proposed ballasted array. The proposed PV array, including the
ballast required to resist 100 mph wind speeds has an approximate weight of 6 psf. I have done the
necessary engineering and have determined that the existing roof framing of the addition is
adequate to support the proposed PV array.
Please contact me if you have any questions or need additional information.
Sincerely,
/ H of
DAVID A. yG
VREELAND
David Vreeland, PE GIVIL
Vreeland Design Associates � No.46317
Design 9029 GISTEP���t�4
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116 River Road, Leyden, MA 01337 Phone: (413) 624-0126
Email: dvreeland @verizon.net Fax: (413) 624-3282