FUNCTIONS OF OKA L-SHAPE WALL:

• Open Drains
• Retaining Wall
• Used as Storage/Fencing Walls

HANDLING OF OKA L-SHAPE WALL:

Site Stacking - OKA L-shape wall shall be stacked on leveled ground at site.

Site Laying/Installation - OKA L-shape wall shall be laid on well compacted ground bedding.

ADVANTAGES OF OKA L-SHAPE WALL:

• Finish products manufactured with dimensional accuracy and consistency under control factory environment.
• Simple application and maintenance free products.
• OKA L-shape wall can be off loaded directly from transport and assembled in a single operation.
• Easy in handling and laying.

• Structural design is in accordance to BS 8110.
• Hydrostatic pressure is not considered in design as 50mm weep hole will be provided to relieve water pressure behind the wall.
• Design loadings are generally categorized in 3 types:

 
Open Drain – Short leg backfill with granular soil

Type 1: Level backfill with 10 kN/m² of live load surcharge

Type 2: Non level backfill with max of 600mm height from top of wall and slope gradient of 30^o

Retaining Wall – Long leg backfill with granular soil

Type 3: Level backfill or non-level backfill similar to above type 1 and type 2 loading condition

MATERIAL SPECIFICATION:

• Concrete grade shall be 40 N/mm²
• Concrete cover = 30mm
• Bulk density of backfill soil to be 19 kN/m³
• Angle of internal friction of backfill soil = 30^o