Raking of Sandstone Seawalls

Raking of sandstone seawalls may be readily achieved by stepping the courses.  Each successive course of blockwork is back-set some 100mm to 150mm.  This construction technique significantly improves the stability of blockwork seawalls.  It has the two-fold impact of improving the centre of gravity of the wall and reducing the volume of active soil being retained.  It also facilitates more economical construction, since less mass of stone and fill are required.  As the photos indicate, it can be done either above water, below water, or both.