Setback Chart for Retaining Walls

Allan Block retaining wall blocks come in a variety of setbacks. Note: retaining walls designed with a 12° setback need more space than a 6° retaining wall but will be stronger and more stable.

Allan Block Retaining Walls Setback Chart
Setback Wall Height
4 ft
(1.2 m)		 6 ft
(1.8 m)		 8 ft
(2.4 m)		 10 ft
(3.0 m)

AB Stones only
of the AB Collection

 10.0 in
255 mm		 15.0 in
380 mm		 20.0 in
510 mm		 25.0 in
635 mm

AB and AB Europa Collection
(excluding AB Stones & AB Vertical)

 5.0 in
125 mm		 7.5 in
190 mm		 10.0 in
255 mm		 12.5 in
320 mm

AB Fieldstone Collection

 5.0 in
125 mm		 7.5 in
190 mm		 10.0 in
255 mm		 12.5 in
320 mm

AB Vertical only
of the AB Collection

 2.5 in
65 mm		 3.75 in
95 mm		 5.0 in
125 mm		 6.25 in
160 mm
Note:All values are provided for reference only.