Longitudinal drainage: 1 - wall, 2 - foundation, 3 - drainage, 4 - crushed stone, 5 - geotextile, 6 - sand, 7 - rough.

The longitudinal drainage device consists of a perforated pipe laid along the wall.

longitudinal drainage - gravel or sand backfill and perforated drain pipe laid at the base of the foundation from the back of the wall,

Wheel tires have a tread pattern excepting longitudinal drainage grooves.

Retaining stone wall, whose height is 1 meter, with the presence of longitudinal drainage.