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THRIVE
David L. Ortiz
Owner / Designer
o 303.931 .1084
o david@thrivedesignarchitectur
e.com
h thrivedesignarchitectu re.com
3491 West Amherst Avenue
Denver, Colorado 80236
DESIGN
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CTLITHOMPSON
February 13,2024
Thrive Design
3491 West Amherst Avenue
Denver, Colorado 80236
Attention: Mr. David Ortiz, Owner / Designer
Subject:Crawlspace / Basement Common Wall Bearing & Deck Lateral Ties
55 River Park Lane
Lot F3, Aspen Glen Subdivision, Garfield Gounty, Colorado
Project No.: DN51 835.000-L1
As requested, we reviewed the struc'tural plans for the house (Project No.
DN51835.000, dated April 21 , 2023, revised January 12, 2024) and photos of the crawlspace
/ basement common wall that were e-mailed to uS January 18,2024- The purpose of our
review was to provide an opinion about the adequacy of the bearing of the frame wall and
recommendations for an alternative deck lateral tie. For description purposes, the house is
assumed to face east.
ffi Foundsd in
At the crawlspace / basement common wall, the frame wall overhangs the
crawlspace side of the foundation wall. lt is our understanding that the overhang is about 3-
1/2" at the south end of the wall and the frame wall is flush with the foundation toward the
north end. To provide additional support for the wall, an approximate 30 ft long L4'x4"x114"
steel angle was attached to the south end of the foundation wall with 112" diameter wedge
anchors with an embedment of about 5", spaced at about 48" on center. A2x'i'0 was used
for the sill plate of the frame wall and full width studs were use of the frame wall. lt is our
opinion that the crawlspace / basement fiame wall has adequate bearing to support the
design loads.
At the rear deck, the structural plans recommend using (2) USP DTB-TZ or (2)
Simpson DTT2Z deck tension ties for lateral support. As an alternative, it is our opinion that
(4) Simpson DTT1Z deck tensions ties may be used.
Thank you for selecting CTL I Thompson for your engineering needs. \Mren we can
be of further servi@, please contact us.
Sincerely,
cTL I
Christopher G.
Principal ChtistopherG: strt{dbtobuc
Lytle ticaonerrym
CGL
viae-mail: david@thrivedesionarchitecture.com
CTL I Thompson, lnc.
Denver, Fort Collins, Coloradargplings, Glenwood Sprinqs, Pueblo, Summit Countv - Colorado
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