Submission Sheet

Submission sheet for mass gravity retaining walls

To download the updated versions in PDF format:

Submission sheet for gravity walls
Submission sheet for reinforced walls


  • Retaining wall to be constructed of Terraforce precast concrete blocks. (Type as indicated.)
  • Blocks placed as shown and to be filled with well tamped topsoil.
  • For walls retaining clay or shale, provide a free draining sand layer behind wall. Backfill to be well rammed in 150mm layers.
  • Drainage outlet pipes to be provided at toe of slope and to be capped with geotextile.
  • Stormwater cut-off drain is to be provided above the wall where necessary.
  • Ground under all bases to be of approved granular material well compacted prior to constructing base.
  • The engineer is to be notified of any variations of levels or dimensions shown.
  • Minimum concrete strength for concrete foundations to be 20MPa at 28 days (to be designed accordingly).
  • Shear keys with a minimum design shear stress of 0,3N/mm² are to be installed as indicated. i.e. 75 x 75 mm 1:4 cement or crusher-sand mortar or 40mm H.D.P.E Class 6 pipe sections.
  • No services or trenches permitted immediately in front of the retaining wall.
  • Maximum superimposed loading as indicated behind wall (surcharge).
  • Concrete keys to be class 1 mortar or 15Mpa concrete.
  • Please refer to the Terraforce construction manual and the guide to Terraforce L13 retaining walls for further detalls.
  • The Terraforce block retaining wall design spreadsheet can also be used to assist in the design process.

Submission Sheet:


Retaining wall detail / Submission sheet
Blocks Wall Foundation
Block type Height (H) Type
Height (h) Tilt angle (ß) l1
Width (B) Surface angle (i) l2
Offset (x)
(set back)
Height of keys (Hk) l3
Keys per m2 Keyless height (Ho) d1
layer width (c)
Surcharge (kN/m2) d2
Title: TERRAFORCE retaining wall detail
Designed: Checked:
Drawn: Date: