CPD Specifier May 2015 issue September 2015 | Page 49

Outdoor Engineering

TIMBER CRIB
Timber Crib is a mass gravity system comprising interlocking timber
header and stretcher units that form a cribwork structure which is then
filled with stone, typically 75-40mm. The system is straightforward to
install and forms an effective retaining structure where the aesthetics of
timber are desired.
Sustainability and aesthetics are often strong influencing factors in the
choice of timber crib over other retaining wall systems. Timber provides
a unique balance of function and appearance. Timber weathers naturally
and it is easy to build in pockets of soil behind the wall face which can be
planted to further soften the aesthetics.
MASONRY
Maccaferri’s MacWall system provides a masonry faced retaining wall. The
blocks work with geo-grids to form a robust and highly efficient reinforced
soil structure. The individual, split-faced concrete blocks are dry laid by
hand onto prepared granular footings - no concrete or mortar is required.
4.0m high Q