HomeMy WebLinkAboutPermit Correspondence 1992-6-4
/
--
@
'-
Branch
Engineering
"\
June 4, 1992
212 m St:reet:
Springfield, Oregon 97477
[503] 746-0637
FAX [503] 746-0389
Tom Marx
City of Spnngfield
Planmng and Development
225 North Fifth
Spnngfield, OR 97477
Re #<l20602 - 192 Chapman Lan" "prmgfield
Dear Tom
As you know, the foundatIOns placed beneath remodeled areas at the above reSidence were
mstalled at vanance with Code provlSlons The footmgs were shallow with respect to the wall
height, and the concrete used was site mixed, with an unknown mix deSign
To remedy the shallow footmgs, additional pressure treated Sills are bemg mstalled, to make the
distance between reqUired mlmmum fimshed grade and un-treated lumber at least 8"
To venfy concrete strength, a rebound hammer test was performed on the concrete by Braun-
Intertech The approximate strength was determmed to be between 1900 and 2500 pSI (thiS IS
after 28 days of cunng) ThiS IS less than the Code reqUired 3000 pSI, but It IS an appropnate
engmeenng value for the type and dlstnbutIon of loads
Smce the reqUired strength values are based on weathenng factors, and the under-strength
concrete Will be protected from weather, the footings are adequate for the mtended use
~ .
:\J):'
.~
Steve Keatmg
!
\.
TRANSPORTATION
CIVIL
SURVEYING
/
.
BRAUN'M
INTERTEC
Braun Intertec Northwest, Inc.
2280 Nugge'VVay
Eugene, Oregon 97403
503746-9649 Fax 746-7163
Engineers and ScIentIsts Serving
,he BUilt and Nalura! EnVIronments
June 2, 1992
Report No: E-51857
ProJect No: EBXX-92-0419
Mr. Berlane Ham1lton
SX Molemen
385 N. 26th street
Springfield, Oregon
97477
Project: Residential Remodel
192 Chapman Lane
Spr1ngf1eld, Oregon
Dear Mr. Ham1lton:
SubJect: Results of rebound hammer test performed by our
representat1ve on the 1n-place foot1ng concrete on
the southeast and northwest corners at the above
ment10ned project on June 01, 1992.
Report: Rebound Tests on Hardened Concrete - ASTM C805-79
Average Converted
Location Rebound PSI
Northwest Footinq
1 ' west of rear entrance 22.4 1900
6' west of rear entrance 25.1 2300
10' west & 4' south of
rear entrance 22.9 2100
southeast Footinq
2 ' south of front entrance 24.6 2250
9' south of front entrance 25.6 2500
10 ' south & 4 ' west of
front entrance 25.0 2300
It should be noted that var1at1ons can occur in rebound read1ngs
due to several cond1t1ons, including, but not lim1ted to: air
pockets at or near the surface; cold temperatures; rebar or large
aggregate at or near the surface; actual surface conditions.
Therefore, the converted p. s. i. was provided for correlat10n
purposes only.
Respectfully sUbmitte~_\
1z~~f:!iu1e:, Man~~
Eugene B~~~YI