Block wall.

[trowelandhawk]

Gonna be building a dense block wall soon approximately 15mx1.2m. It will be blocks laid flat for the thickness. I will put weep holes in the bottom of the wall to for drainage. Can I just lay 15m of block like this without a pillar or two for strength. I think I will need about 450 blocks but not sure about sand an cement for this task. Any estimates on this or the equation needed for this please.
Many thanks in advance.

 

[stuart45]

Is this a retaining wall?

 

[trowelandhawk]

In a way yes... The garden behind is on slope and we have cut into land to get terrace so I would say yes. But it is only a metre high.

 

[stuart45]

Make sure you put a proper drainage system behind the wall as well as the weepholes.

 

[trowelandhawk]

Never thought about that.... How do I go about that

 

[freddiemercurystwin]

Little need for a drain IMO, for a garden wall //www.diynot.com/forums/viewtopic.php?t=278828

Rough rule of thumb for mass retaining wall is that the depth at the base should be about 1/4 - 1/3 of the height

 

[stuart45]

Dig out a bit more at the back and fill up with stones, protected with a membrane.