HomeMy WebLinkAboutEngineer's Report 12.21.2022Strumph Engineering
structural design and consulting services
Date: 12/21/2022
Carbon Customs
3894 Hwy 82 Unit B
Glenwood Springs, CO 81601
Project: Gerson Pergola Project Number: 22073
68 Bald Eagle Way, Carbondale, Colorado
To Whom it May Concern,
Personnel from Strumph Engineering have reviewed assembly and erection drawings for an
aluminum pergola structure to be installed at the existing residence located at 68 Bald Eagle Way
in Carbondale, Colorado. The proposed aluminum pergola structure will replace an existing
wooden pergola structure of similar dimensions. The proposed pergola structure will be
supported along two edges by the existing residence. A third edge of the pergola is intended to
be supported on three existing concrete piers, assumed to be founded on standard spread
footings typical for residential construction in this area.
The Pergola structure shall be attached to the existing residence along two edges as shown on
sheets A104 and A309 of the erection and assembly drawings by Struxure Inc., dated 10/06/22,
using 5" Ledgerlok screws by Fasten Master or SDS25500 screws by Simpson, spaced at 16" on
center (staggered top and bottom) and installed into the existing rim joist, existing 2x4 or 2x6
studs (centered on studs), or fully supported blocking between studs. Ledger attachment
assumes conventional wood platform framing for the exterior wall supported by concrete
foundation walls.
The pergola shall be attached to the existing concrete piers with the following requirements:
1. Existing concrete piers shall be a minimum 10" x 10" square or 12" diameter round piers.
2. Existing piers shall be founded on spread footings at or below frost depth.
3. If existing concrete piers do not meet the above requirements, new concrete piers shall
be installed as shown on SK-1(attached).
4. Post base provided by manufacturer shall be attached to new or existing concrete piers
with %" diameter epoxy or screw anchors with 4" embedment into concrete (Simpson
SET epoxy, Simpson Titen HD screw anchors or approved equivalent).
PO Box 5044, Eagle, CO 81631
970-705-1610
An allowable bearing pressure of 1000 psf has been assumed for the design of the
footings. This value shall be verified by a Geotechnical Engineer or as required by the
Building Department.
Our analysis assumes motorized louver blades shall be locked in the vertical or open position
during high wind or accumulating snowfall events as noted on the drawings provided by the
manufacturer. General Contractor shall verify all existing conditions prior to construction and
report any discrepancies from design assumptions to Strumph Engineering for re-evaluation.
Please call our office with any questions.
Sincerely,
Strumph Engineering
�5
Michael Strumph, PE
President
Gerson Pergola #22073 12/21/2022
68 Bald Eagle Way, Carbondale, CO page 2 of 2
r PERGOLA COLUMN r!
BASE BY OTHERS
I" SHIM/GROUT RECOMMENDED, 142" 0 THREADED ROD
VERIFY w/ MANUFACTURER w/ 51MP50N 5ET
EPDXY OR Y2"iP TITEN
EXI5TIN6 SLAB ON HO w/ 4" EMBEDMENT
GRADE INTO CONCRETE
r SLIP JOINT
V
� e '
d
12" (P CONCRETE PIER w/
d (4)-#4 VERTICAL WITH
STANDARD HOOKS
m 2&"(P BELLED
FOOTING (B16FOOT o ". #3 TIES @ TOP,
OR ECG a MID -HT, BOT
a
A, $ a
I.L
m Q
w
J
v
SGALf
*/4"= I' -on
NOTES:
I. NEW CONCRETE SHALL HAVE A MINIMUM 2& DAY COMPRE551VE STRENGTH OF
3000 psi. ALL CONCRETE WORK 5HALL BE IN ACCORDANCE WITH AC1 305.
2. REINFORGIN6 STEEL SHALL BE ASTM A615, GRADE 60 DEFORMED
BARS.
3. GROUT SHALL BE NON -SHRINK, NON-METALLIC GROUT WITH A
MINIMUM 2& DAY GOMPRE551\/E STRENGTH OF 5000 psi.
Strumph
Engineering
PO Box 5044 970 705-1610
Eagle, CO 81631 info@strumphengineering.com
Project #: 22073
De5crlption: OER5ON PFROOLA
Sheet: 5K-1
Date: 12/21/2022