Cutting Concrete Block Gables Video
The diagram above will display the selected end, corner, bond and bond beam settings.
Mark and cut the blocks first, numbering cut and off-cut. Then it's easy to lay the blocks up the rake by number.
The cut sizes are very accurate, so it's easy to keep the rake line straight without a string line.
If you can't build the high end corner to the top of the rake, for the line, it's better not to use one.
As ascending courses have less perp joints, the rake will center itself if you keep bond.
Just keep gauge and bond and you'll be amazed how straight and accurate the rake ends up.
With 2 bond beam courses, the second course bond is staggered forward, so the core centres line up vertically,
allowing easy placement of vertical reinforcing steels.
With a plain rake (not corner up) if you can alter the angle and starting height of your rake, you can optimize offcut matching, and use repeating sets of same size cuts,
sometimes with just 1 cut size for the entire rake.
This makes marking and cutting much faster, because there are only a few different size cuts in the whole rake, and they repeat.
These are some angles and starting heights with matching sets. Select an entry to re-calculate the rake.
Repeating Sets