HomeMy WebLinkAboutSoils & Foundation Report 12.13.2013December 13, 2013
Pura Vida Holdings, L.L.C.
c/o Oates, Knezevich, Gardenswartz, Kelly & Morrow, P.C.
533 E. Hopkins Avenue, Third Floor
Aspen, CO 81611
Attention: Ms. Sarah Oates
Associate
Subject: Greenhouse and Workshop/Shed Floor Slabs
Pura Vida Ranch
River Valley Ranch
Carbondale, Colorado
Project No. GS05690-120
CTL 1 THOMP ON
We understand that slab -on -grade floors are planned for the greenhouse and
workshop/shed at the Pura Vida Ranch. Mr. Jeff Dickinson, your architect asked we
provide our opinion of slab -on -grade construction for building floors. Our opinions of
slab -on -grade floors and recommendations are below.
The planned building locations are at the same general location as the
previous planned greenhouse location. We drilled two borings (TH-5 and TH-6) at
the prior greenhouse location. We found silty to clayey sand underlain by gravels in
these borings. We are assuming that the subsoils at the slab -on -grade floor
subgrade elevations will be non -expansive silty to clayey sand, similar to that found
in our borings. it is important that a representative of CTL f Thompson, inc. observe
completed excavations in preparation of slab placement.
Construction of slab -on -grade floors for the greenhouse and workshoplshed
on natural non -expansive silty to clayey sand is appropriate. We would anticipate
good slab performance. We recommend the following subgrade preparation
recommendations and precautions for slab -on -grade construction at this site. The
precautions will not prevent movement from occurring; they tend to reduce damage
if slab movement occurs. •
234 Center Drive Glenwood oo_a Springs, Cocrado 81601
Tele.phcne: 970-945-280-9 Fax: 970-945-7411
Subgrade soils should be moisture treated to within 2 percent of
optimum moisture content and compacted to at least 95 percent of
standard Proctor dry density (ASTM D 698). The subgrade should be
proof rolled to check for soft areas prior to placement of concrete.
2. Slabs should be separated from exterior walls and interior bearing
members with slip joints which allow free vertical movement of the
slabs.
3. The use of underslab plumbing should be minimized. Underslab
plumbing should be pressure tested for leaks before the slabs are
constructed. Plumbing and utilities which pass through slabs should
be isolated from the slabs with sleeves and provided with flexible
couplings to slab supported appliances.
4. Frequent control joints should be provided, in accordance with
American Concrete Institute (ACI) recommendations, to reduce
problems associated with shrinkage and curling.
We appreciate the opportunity to work with you on this project. If you have
questions or we can be of further service, please call.
Very truly yours,
CTL I T IOMP
nch Man
JM:cd
2472 n .
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cc: Via email to smo@okglaw.com
PURA VIDA HOLDINGS, L.L.C.
PURA VIDA RANCH
PROJECT NO. GS05690.120
S:5GS05590.000512010. Leders13505690 120 L2.doc