Patio Leveling & Foundation

Contractor Reference Drawing — Backyard Landscaping Phase 2
43.5' x 14' Wrap-Around Patio | CMU Core + Stone Veneer Wall | 17.25" wall + 4" slab = 21.25" total | 45° Chamfered Corners NOT TO SCALE

Plan View — Looking Down

X: 0 = Street Fence (left), 84 = Neighbor Wall (right)  |  Y: 0 = House (top), 63.5 = Back Fence (bottom)
← STREET (X=0)
NEIGHBOR (X=84) →
STREET FENCE (X=0)
HOUSE WALL (Y=0) — X=7.5 to X=66
7.5'
CONCRETE PATIO
43.5' x 14' — At House Level
4" slab on 3" gravel base (7" total)
A (~9')
B (~7')
C — FRONT WALL (~33.5') — 17.25" wall + 4" slab = 21.25"
D (~7')
E (~9')
STEPS
3 risers, ~6' wide
● = Recessed LED step lights (~6-8' o.c., mid-height on wall)
ADDITIONAL LEVELED AREA ~33' x 16' — Sod At yard level (-21.25") X=51 to X=84 (neighbor property line)
3' HOUSE BORDER
F — BORDER WALL (~11.5')
A
A
43.5' (X=7.5 to X=51)
14' depth
~33' (X=51 to X=84)
LEVEL YARD — 21.25" below house level (starts at Y=14.6')
5' slope cut extends level yard from Y=19.6 to Y=14.6 across full 84' width

Section A-A — Wall Cross Section at Front Edge (Y=14')

CMU Core + Stone Veneer Retaining Wall with Cantilevered Slab Overhang
YARD LEVEL (0" REF)
PATIO SURFACE (+21.25")
← WALL TOP / SLAB BOTTOM (+17.25")
FOOTING24"W x 8"D3000 PSI
#4 rebar cont.
4" CONCRETE SLAB — 3000-4000 PSI
4" slab
edge
(concrete)
3" GRAVEL BASE
GRAVELBACKFILL3/4"
COMPACTEDFILL95% Proctor
4" perf. drain pipe
SLAB OVERHANG
1.5-2"
(past CMU face)
DRIP KERF
3/8" x 3/8"
3/4" from edge
L-bar #4 @ 24" o.c.
ties slab to wall
LED STEP LIGHT
Recessed in veneer, 12V
IP65+, 2700-3000K
~8-9" above yard grade
12AWG LV cable in gravel backfill
21.25" total
17.25" wall
← 4" slab
← 3" gravel
24" CMU
(3 crse)
6.75"
← 8" deep
← 24" wide →
YARD
Finished Grade
PATIO
House Level

Key Specifications

 

Concrete Slab

  • Thickness: 4 inches
  • Mix: 3000-4000 PSI, wire mesh/fiber reinf.
  • Gravel base: 3" compacted 3/4" minus
  • Subgrade: 7" below patio surface
  • Overhang: 1.5-2" past CMU outer face
  • Drip kerf: 3/8" x 3/8" saw-cut, 3/4" from edge
  • Edge: Squared-off, form-stripped finish
  • Dowels: L-bar #4 @ 24" o.c. into CMU cores

Retaining Wall

  • Core: 8" CMU, 3 courses (24"), grouted solid
  • Mortar: Type S
  • Rebar: #4 vertical @ 48" o.c., doweled to footing
  • Veneer: 1-1.5" stone, match existing yard walls
  • Exposed wall: 17.25" + 4" slab edge = 21.25" total
  • Below grade: 6.75" (24" CMU - 17.25" exposed)
  • Total wall length: ~80.5 linear feet

Footing

  • Size: 24" wide x 8" deep
  • Concrete: 3000 PSI minimum
  • Rebar: #4 continuous longitudinal
  • Depth: Min. 12" below finished grade
  • Chamfer turns: 135-deg, rebar overlap 12" min.

Drainage

  • Pipe: 4" perforated, behind wall at base
  • Backfill: 3/4" clean gravel behind wall
  • Weep holes: 3/8" @ 48" o.c. (Segment C)
  • Connect to existing yard drainage system

Lighting (rough-in during CMU)

  • Fixtures: Recessed LED, IP65+, 2700-3000K
  • System: 12V low-voltage, 60W+ transformer
  • CMU penetrations: 3/4" conduit at mid-height

Chamfered Corners

  • Angle: 45 degrees (both ends)
  • Leg length: ~5' each side
  • Diagonal face: ~7'
  • Steps at street-side chamfer (Seg. B)

Steps (Segment B, street side)

  • Width: ~6 feet
  • Risers: 3 @ ~7.1" each
  • Treads: 11-12" deep
  • Total rise: 21.25" | Total run: ~33-36"
  • LED light in each riser face

Earthwork

  • Total cut: ~364 cu ft (13.5 cu yd)
  • Total fill: ~132 cu ft (4.9 cu yd)
  • Surplus: ~232 cu ft (8.6 cu yd) to side yard
Backyard Landscaping — Patio Leveling & Foundation Reference drawing — verify all dimensions on site