HomeMy WebLinkAbout8/13/14 613 N. 1st Ave Retaining Engineering Memo 102513
CD
IVILESIGN
P
ROFESSIONALS
October 25, 2013
Joe Whitter
Joe Whitters Landscaping, Inc.
RE:The Piedmonte Retaining Wall (13 - 237)
Iowa City, Iowa
Design Assumptions:
NCMA Safety Factors:
Keystone Compac Units, Wall Batter
Sliding
1.501.50
NCMA Design
Overturning - Reinforced
2.00
Live Load:50 PSF
Bearing
2.00
Dead Load:400 PSF
Toe Slope:2.5H:1V
Back Slope:2.5H:1V
Seismic:N/A
Soil Design Properties:
c
Reinforced Soil (Sandy Lean Clay)
Reinforced Soil
Retained Soil
Retained Soil
Foundation Soil
Notes:
Soils information obtained from Geotechnical Engineering Report prepared by Terracon Consultants, Inc.
.
dated July 12, 2013 Onsite material is predominately sandy lean clay. An internal friction angle of was
assumed for the onsite material. Where unsuitable soils are found, a subcut may be required and structural
fill shall be placed and compacted to provide an adequate bearing foundation. The above minimum soil
strength parameters shall be verified prior to final design. CDP shall be contacted if the above soil strength
parameters cannot be met and a redesign may be required.
Wall layouts and elevations obtained from Site Grading Plans prepared by MMS Consultants last revised
09-13-13.
Crushed Stone shall be required in the reinforced and retained zones of Walls 2, 3 and 5 in the stairway
location and shall be constructed simultaneously with the stairw
During wall construction, excavation shall remain within the construction limits shown on the plans. All
available means and methods used to keep excavation within the construction limits shall be incidental. The
contractor shall coordinate relocation of all existing conduits
We appreciate the opportunity of providing services to you. If you have any questions or comments regarding
this project, please feel free to contact us.
Steve Schilling
Civil Design Professionals
8609 Lyndale Ave. S., Suite 200 Bloomington, MN 55420
Civil Design Professionals
Office (952) 303-5312 www.cdp-us.com
Joe Whitters Landscaping, Inc.
The Piedmonte
Project # 13 - 237
The final quantities are as follows:
Wall Length4" Cap Area8" Cap AreaGrid Length
Block AreaSG200
Wall
(FT)(SF)(SF)(SY)(SY)(FT)
2,1501,003
335.251505-11
1N/A
269.001601556665-8
372.0036515531795-9
486.2529540N/A896
540.50851035325-6
627.0030010N/A18912
3,3551,558
Totals:
630.00240N/A
144
The unit area and volume quantities are neat quantities. Contractor shall confirm the quantities and add in
any additional necessary factors (i.e., waste, compaction, etc.)
The grid quantity includes a 5% waste factor.
The total wall area of the walls is 3,739 SF (3,355 SF Blocks +
8609 Lyndale Ave. S., Suite 200 Bloomington, MN 55420 8609 Lyndale Ave. S., Suite 200 Bloomington, MN 55420
Civil Design Professionals Civil Design Professionals
Office (952) 303-5312 Office (952) 303-5312 www.cdp-us.com www.cdp-us.com