Dimensions

Dimension of Terraforce Retaining Blocks

Block type units per m² of wall	L11/11	L15/15	Terralite L36/36	Multi 4x4/13
Length (front to back) (B mm)	350	295	229	200
Cover (left to right) (A mm)	400	335	180	400
Height (h mm)	225	200	150	200
Wall thickness	50	45	40	40
Av. mass of block (kg)	30	23	8	18
Infill volume (m)³	0.016	0 .0083	0.0027	0.007
Av. mass constructed kg per m² of wall (single skin)	538	520	430	370
Min crushing strength of block under in-situ loading/Mpa	8	8	8	8
21 day cube strength of concrete (uncured) = 25 Mpa min
Min frictional resistance between blocks without keys:Cf	0.54	0.54	0.54	0.54

Measurement conversion: 1kg = 2.205lbs & 1mm = 0.0394 inches (to convert kg to lbs multiply by 2.205, to convert mm into inches multiply by 0.0394).

Non-standard requirements: Modifications can easily be made to the concrete mix design to suit specific applications, e.g. where a wall is to be constructed in an aggressive environment. Coastal conditions require in particular that the blocks are made of a stronger concrete to achieve durability.