Encompass Retaining Wall 10-24-25.pdf
PDF 1 MB Posted
- Attached to
- IFB #2026-09 Bradford Retaining Wall
- Solicitation number
- IFB-119207
- Issued by
- Craig County, Virginia
About this file
This is a design specification document prepared by Designs Unlimited, Inc., for Encompass Community Supports (a Rappahannock Rapidan Community Services entity) located in Culpeper, Virginia, in Culpeper County. The project involves the construction of a segmental block retaining wall approximately 85 feet in length with a maximum height of 7 feet 6 inches, designed to replace an existing failed retaining wall and buried timber wall at 15361 Bradford Road. The wall design utilizes Anchor Diamond Pro straight-face modular concrete units with geosynthetic reinforcement (Mirafi 5XT or equivalent geogrid), a 12-inch minimum compacted granular-base leveling pad, and integrated drainage infrastructure including 4-inch diameter drain pipe outlets spaced at 40-foot maximum intervals. The project scope includes removal of the failed existing wall and buried timber structure, installation of the new Diamond Pro segmental wall system, Freedom 4-foot black aluminum fencing with 6-foot on-center post spacing, and site grading, seeding, and mulching for final completion. The design is based on 2021 Virginia Construction Code requirements, with assumed soil bearing of 2,000 pounds per square foot, 90 miles per hour nominal wind speed, 30 pounds per square foot ground snow load, and silty/clayey sand soil conditions with non-surcharge design assumptions. The engineer, Designs Unlimited, Inc., located in Boston, Virginia, issued the plans on September 27, 2025 (Project No. 25:074). The specifications allow contractors to propose salvage and reuse of existing landscape block supplemented with matching materials as an alternative approach.
The design specifications address structural requirements, material specifications, and construction details including reinforcement length tables for wall heights ranging from 1 foot to 7 feet 6 inches, with specific geosynthetic placement requirements, cap block installation procedures for curved sections, base preparation details, and integration provisions for guard rail and fence installations designed by others. The document includes detailed cross-sectional drawings, reinforcement connection details, and step-up details for elevation changes. The contractor must field-verify all critical dimensions prior to construction, as field conditions may vary from the design shown. Cap block installation requires adherence to a five-step process beginning from the lowest elevation and utilizing exterior-grade construction adhesive. Alternative segmental block materials may be proposed to the owner for consideration. All construction must comply with manufacturer literature for wall and fence details not specifically shown in the engineering drawings.
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Text version
OWNER:
15361 BRADFORD ROAD
CULPEPER, VA 22701
(540)825-3100
PROJECT LOCATION:
15361 BRADFORD ROAD
CULPEPER, VA 22701
NOMINAL WIND SPEED = 90 MPH
ULTIMATE WIND SPEED = 115 MPH
SOIL BEARING VALUE (ASSUMBED) = 2,000 PSF
GROUND SNOW LOAD = 30 PSF
EXPOSURE CATAGORY = B
IMPORTANCE FACTOR = CATAGORY II
SNOW EXPOSURE FACTOR = 1.0
SEISMIC USE GROUP = B
DESIGN LOADS
DESIGNS UNLIMITED, INC.
ENGINEER:
6360 TENNIS COURT
BOSTON, VA 22713
(540)212-8330
ENCOMPASS COMMUNITY SUPPORTS
PROJECT DATA
STRUCTURAL DESIGN DATA
LATERAL EARTH PRESSURE = 30 P.C.F.
PROJECT DATA
SITE PLAN
1/4" = 1'-0"
ELEVATION
1/4" = 1'-0"
12" MINIMUM COMPACTED
GRANULAR-BASE
LEVELING PAD
MAINTAIN 1 FULL BLOCK BELOW
GRADE MINIMUM
AutoCAD SHX Text THIS PROJECT HAS BEEN DESIGNED FOR THE CONSTRUCTION OF A SEGMENTAL BLOCK RETAINING WALL
AutoCAD SHX Text AT THE ENCOMPASS SITE LOCATED AT 15361 BRADFORD ROAD, CULPEPER, VA IN CULPEPER COUNTY.
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SHEET NO.
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DATE:
AutoCAD SHX Text 09-27-25
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PROJ. NO.:
AutoCAD SHX Text 25:074
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ENCOMPASS RETAINING
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ISSUED
AutoCAD SHX Text 09-27-25
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REVISED
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PROJECT
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TITLE:
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DRAWING
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TITLE:
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OWNER:
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CULPEPER, VA 22701
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15361 BRADFORD ROAD
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ENCOMPASS COMMUNITY SUPPORTS
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DESIGN BY:
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CS
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CS
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DRAWN BY:
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CHECKED BY:
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DF
AutoCAD SHX Text (540)212-8330
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RETAINING WALL PLAN
AutoCAD SHX Text (540)825-3100
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ENGINEER:
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BOSTON, VA 22713
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6360 TENNIS COURT
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DESIGNS UNLIMITED, INC.
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WALL
AutoCAD SHX Text H = 1'-0"
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GENERAL NOTES
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* THIS PROJECT HAS BEEN SPECIFICALLY DESIGN FOR ENCOMPASS LOCATED AT 15361 BRADFORD ROAD, CULEPEPER, VA.
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* GRADING AND SITE INFORMATION SHOWN HEREON AND USED AS A DESIGN BASIS COMES FROM FIELD MEASUREMENTS.
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* FIELD CONDITIONS MAY VARY FROM DESIGN SHOWN HEREON. CONTRACTOR TO FIELD VERIFY ALL CRITICAL DIMENSIONS
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PRIOR TO CONSTRUCTION.
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* THE SEGMENTAL BLOCK RETAINING WALL PROPOSED IN THE DRAWINGS IS THE ANCHOR DIAMOND PRO STRAIGHT FACE
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BLOCK. ALTERNATIVE BLOCK MAY BE PROPOSED TO THE OWNER FOR CONSIDERATION.
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* DESIGN BASIS IS SILTY/CLAYEY SAND SOIL.
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* DESIGN BASIS IS A NON-SURCHARGE AREA BEHIND RETAINING WALL.
AutoCAD SHX Text H = 7'-6"
AutoCAD SHX Text H = 1'-0"
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GRADE
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EXISTING BURIED TIMBER RETAINING WALL
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TO BE REMOVED
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EXISTING BURIED TIMBER RETAINING WALL
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TO BE REMOVED
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EXISTING BURIED TIMBER RETAINING WALL
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TO BE REMOVED
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FREEDOM 4' BLACK ALUMINUM FENCING WITH
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POSTS @ 6' O.C.
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FREEDOM 4' BLACK ALUMINUM FENCING WITH
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POSTS @ 6' O.C.
AutoCAD SHX Text 09-27-25
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PROJECT SCOPE
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* THIS PROJECT HAS BEEN DESIGNED TO REPLACE AN EXISTING FAILED RETAINING WALL.
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* CONTRACTOR TO REMOVED EXISTING FAILED WALL AND ALSO AN OLD TIMBER WALL BURIED BEHIND THE
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CURRENT FAILED WALL.
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* CONTRACTOR TO INSTALL NEW DIAMOND PRO WALL AND FREEDOM FENCE AS SHOWN WITH GRADING, SEEDING, AutoCAD SHX Text
AND MULCHING FOR FINISHED PRODUCT.
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* CONTRACTOR MAY PROPOSE TO SALVAGE AND REUSE EXISTING LANDSCAPE BLOCK AND SUPPLEMENT AS
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NECESSARY WITH MATCHING BLOCK.
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* SEE MANUFACTURERS LITERATURE FOR ALL WALL AND FENCE DETAILS NOT SHOWN HEREON.
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DESIGN CODE = 2021 VIRGINIA CONSTRUCTION CODE AND APPLICABLE AMENDMENTS.
LEVEL BACKFILL / NO SURCHARGE
4 7'-0"
DH
(FT)
(FT)
OF WALL
HEIGHT FOOTING
DEPTH
L
0'-0"
5'-0" 0'-0"
(FT)
0'-0"
LENGTH X2
NONE
NONE
NONE
NONE
1'-0"
NONE
NONE NONE
X1
5 7'-6"
12" 12" 12"
1'-0" 1'-0"
10'-0" 9'-0" 8'-0"
12'-0"
NONE
NONE
NONE
NONE
NONE
X3
NONE
NONE
NONE
NONE
X4
NONE
1'-0" 1'-0" 1'-0" 1'-0"
3'-0" 3'-0" 3'-0" 3'-0" 3'-0"
4'-6" 4'-6" 5'-0"
NONE
6'-6" 6'-0"
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
X5
3'-0" 4'-6" 6'-0" 7'-6"
NONE NONE
X6
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONENONE
NONE
GEOSYNTHETIC PLACEMENT - OUTSIDE CORNER
PLACE 3" OF SOIL FILL BETWEEN
OVERLAPPING REINFORCEMENT
FOR PROPER ANCHORAGE
D
IR
EC
TI
O N
O F
ST
RE
N
GT
H (R
O
LL
D
IR
EC
TI
O N
(ROLL DIRECTION)
DIRECTION OF STRENGTH
MIRAFI 5XT OR EQUIVALENT GEOGRID
12" 12" 12" 12"
12" 12"
10 12" 1'-0"14'-0" 3'-0" 4'-6" 6'-0" 7'-6" 9'-0"
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SCALE: N.T.S.
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TYPICAL SECTION-REINFORCED RETAINING WALL
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REINFORCED BACKFILL COMPACTED 95% OF MAXIMUM STANDARD PROCTOR DENSITY
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MODULAR CONCRETE UNIT
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IMPERVIOUS FILL
AutoCAD SHX Text D
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MODULAR CONCRETE
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FACING UNITS
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CAP UNIT
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ADHERE TO TOP UNIT
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W/ CONCRETE
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ADHESIVE
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IMPERVIOUS FILL
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12" DEEP
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GEOSYNTHETIC REINFORCEMENT
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SEE TABLE FOR LENGTH, TYPE,
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AND SPACING
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DRAINAGE AGGREGATE
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12" THICK MINIMUM
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GRANULAR LEVELING PAD
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12" THICK MINIMUM
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4" DIA. (MIN.) DRAIN PIPE
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OUTLET @ END OF WALL
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OR @ 40' CENTERS MAX.
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SLOPE TO DRAIN (1/8"/FT.)
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SCALE: N.T.S.
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BASE BLOCK
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DESIGN BASED ON CLAY & SILT SOIL W/ SLOPING BACKFILL
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SHEET NO.
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DATE:
AutoCAD SHX Text 09-27-25
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PROJ. NO.:
AutoCAD SHX Text 25:074
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ENCOMPASS RETAINING
AutoCAD SHX Text S2
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ISSUED
AutoCAD SHX Text 09-27-25
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REVISED
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PROJECT
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TITLE:
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DRAWING
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TITLE:
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OWNER:
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CULPEPER, VA 22701
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15361 BRADFORD ROAD
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ENCOMPASS COMMUNITY SUPPORTS
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DESIGN BY:
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CS
AutoCAD SHX Text
CS
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DRAWN BY:
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CHECKED BY:
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DF
AutoCAD SHX Text (540)212-8330
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RETAINING WALL PLAN
AutoCAD SHX Text (540)825-3100
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ENGINEER:
AutoCAD SHX Text
BOSTON, VA 22713
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6360 TENNIS COURT
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DESIGNS UNLIMITED, INC.
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WALL
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GENERAL NOTES
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* THIS PROJECT HAS BEEN SPECIFICALLY DESIGN FOR ENCOMPASS LOCATED AT 15361 BRADFORD ROAD, CULEPEPER, VA.
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* GRADING AND SITE INFORMATION SHOWN HEREON AND USED AS A DESIGN BASIS COMES FROM FIELD MEASUREMENTS.
AutoCAD SHX Text
* FIELD CONDITIONS MAY VARY FROM DESIGN SHOWN HEREON. CONTRACTOR TO FIELD VERIFY ALL CRITICAL DIMENSIONS
AutoCAD SHX Text
PRIOR TO CONSTRUCTION.
AutoCAD SHX Text
* THE SEGMENTAL BLOCK RETAINING WALL PROPOSED IN THE DRAWINGS IS THE ANCHOR DIAMOND PRO STRAIGHT FACE
AutoCAD SHX Text
BLOCK. ALTERNATIVE BLOCK MAY BE PROPOSED TO THE OWNER FOR CONSIDERATION.
AutoCAD SHX Text
* DESIGN BASIS IS SILTY/CLAYEY SAND SOIL.
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* DESIGN BASIS IS A NON-SURCHARGE AREA BEHIND RETAINING WALL.
09-27-25
12" MINIMUM COMPACTED
GRANULAR-BASE
LEVELING PAD
NATIVE SOIL
STRAIGHT UNITS
BEVELED UNITS 10" MINIMUM
EXTEND GEOSYNTHETIC REINFORCEMENT
TO WITHIN 2 INCHES OF THE LOWER BLOCK FACE
10" MINIMUM
10" MINIMUM
GEOSYNTHETIC REINFORCEMENT
SLEEVE AND NON-SHRINK
GROUT AROUND POST.
SLEEVE INSTALLED DURING
WALL ERECTION.
SLEEVE AND NON-SHRINK
GROUT AROUND POST
DEPTH VARIES
3.0 FEET
(MINIMUM)
FENCE OR RAILING
(DESIGNED BY OTHERS)
BLOCK
BLOCK
10.6°
REINFORCEMENT LENGTH
CAP
BLOCK
CAP
BLOCK SLOPE MAY VARY
NATIVE SOIL
12" MINIMUM COMPACTED
LEVELING PADGRANULAR-BASE
LEVELING PAD TRENCH
APPROXIMATE LIMITS OF EXCAVATION
2'
SLEEVE AND NON-SHRINK
GROUT AROUND POST.
SLEEVE INSTALLED DURING
WALL ERECTION.
BLOCK
CAP
BLOCK
GEOSYNTHETIC REINFORCEMENT
DEPTH VARIES
BLOCK
10.6°
REINFORCEMENT LENGTH
CAP BLOCK SLOPE MAY VARY
3.3 FEET
(MINIMUM)
GUIDE RAIL (DESIGNED BY OTHERS)
SLEEVE FOR POST/PIPE
(PVC OR SIMILAR)
INSIDE CURVE
WALL FACE
TOP
OUTSIDE CURVE
SAW-CUT AS
REQUIRED TO
CONSTRUCT
90-DEGREE
MITERED
CORNER
SPLIT FACE AND END
1. Always start capping wall from the lowest elevation
2. Lay out caps prior to using adhesive
3. Cut caps to fit. Various combinations of long and short cap faces will be necessary for radii greater than the minimum.
4. Alternate short and long faces every other cap to achieve a straight row of caps.
5. Use exterior-grade construction adhesive to secure caps.
STEP UP DETAIL BASE PREPARATION DETAIL CAP BLOCK DETAIL
REINFORCEMENT CONNECTION DETAIL FENCE DETAIL GUARD RAIL DETAIL
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SCALE: N.T.S.
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SCALE: N.T.S.
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SCALE: N.T.S.
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SCALE: N.T.S.
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SHEET NO.
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DATE:
AutoCAD SHX Text 09-27-25
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PROJ. NO.:
AutoCAD SHX Text 25:074
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ENCOMPASS RETAINING
AutoCAD SHX Text S3
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ISSUED
AutoCAD SHX Text 09-27-25
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REVISED
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PROJECT
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TITLE:
AutoCAD SHX Text
DRAWING
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TITLE:
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OWNER:
AutoCAD SHX Text
CULPEPER, VA 22701
AutoCAD SHX Text
15361 BRADFORD ROAD
AutoCAD SHX Text
ENCOMPASS COMMUNITY SUPPORTS
AutoCAD SHX Text
DESIGN BY:
AutoCAD SHX Text
CS
AutoCAD SHX Text
CS
AutoCAD SHX Text
DRAWN BY:
AutoCAD SHX Text
CHECKED BY:
AutoCAD SHX Text
DF
AutoCAD SHX Text (540)212-8330
AutoCAD SHX Text
RETAINING WALL PLAN
AutoCAD SHX Text (540)825-3100
AutoCAD SHX Text
ENGINEER:
AutoCAD SHX Text
BOSTON, VA 22713
AutoCAD SHX Text
6360 TENNIS COURT
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DESIGNS UNLIMITED, INC.
AutoCAD SHX Text
WALL
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GENERAL NOTES
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* THIS PROJECT HAS BEEN SPECIFICALLY DESIGN FOR ENCOMPASS LOCATED AT 15361 BRADFORD ROAD, CULEPEPER, VA.
AutoCAD SHX Text
* GRADING AND SITE INFORMATION SHOWN HEREON AND USED AS A DESIGN BASIS COMES FROM FIELD MEASUREMENTS.
AutoCAD SHX Text
* FIELD CONDITIONS MAY VARY FROM DESIGN SHOWN HEREON. CONTRACTOR TO FIELD VERIFY ALL CRITICAL DIMENSIONS
AutoCAD SHX Text
PRIOR TO CONSTRUCTION.
AutoCAD SHX Text
* THE SEGMENTAL BLOCK RETAINING WALL PROPOSED IN THE DRAWINGS IS THE ANCHOR DIAMOND PRO STRAIGHT FACE
AutoCAD SHX Text
BLOCK. ALTERNATIVE BLOCK MAY BE PROPOSED TO THE OWNER FOR CONSIDERATION.
AutoCAD SHX Text
* DESIGN BASIS IS SILTY/CLAYEY SAND SOIL.
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* DESIGN BASIS IS A NON-SURCHARGE AREA BEHIND RETAINING WALL.
09-27-25
| 2025-10-24T03:26:05-0400 | |
| Agreement certified by AvanquestEsign-2026 |
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