Building Construction Handbook, Eighth Edition

Crib Retaining Walls † a system of pre-cast concrete or treated

timber components comprising headers and stretchers which

interlock to form a three-dimensional framework. During assembly

the framework is filled with graded stone to create sufficient mass

to withstand ground pressures.

batter

1:4 timber

1:6– 8 concrete

headers

stretchers

with joints

staggered

concrete

foundation

with surface

of incline

finished rough

Note: height limited to 10 m with timber

upper ground

graded granular fill

within cribs and up

to 1 m behind wall

subsoil drain

lower ground

stretcher 100 × 50 mm

up to 2.2 m long

header 100 × 50 mm,

0.6–1.4 m long

spaced at 550 mm

stretcher

1.2 or 1.5 m

Timber preserved with

copper/chrome/arsenic

Reinforced concrete, sulphate

resisting 50 N/mm^2

header

header 300× 125 mm,

0.65, 1.2 or 1.6 m long

stretcherheader

stretcher

Principle †

Components †

Retaining Walls---Cribs