These balau timber stairs that we built in Umhlanga are actually temporary stairs which will be removed at some point. They were built in order to gain access up the bank to a converted container that has been placed at the top. It is for a new development at Umhlanga Ridge and the converted container will be used as a sales office to sell the units. Their life span will depend on how long it takes to sell all the units after which the container and stairs will be removed.
We nevertheless used balau as we needed to create a very upmarket feel as this development is targeted at the high-end market.
Initially we were going to build a platform or landing at the bottom, one at the top and one mid way to break the stairs into two flights. However the total distance did not require that and we settled for a landing at the top and one at the bottom. Normally if the flight of stairs is quite long one needs to split them into two flights with a landing mid way. This is to be compliant with National Building Regulations. It is stipulated for safety reasons because a very long flight of stairs becomes dangerous if not split into two flights.
It is a bit more difficult to build two flights with a landing mid way because one needs to first build your top and bottom landings and then work out exactly at what height the middle landing needs to be. This is so that the two flights can be of equal distance and the risers of the first flight can be equal to the risers of the second flight. If the middle landing is not placed exactly in the middle of the total height, the risers of one flight will need to be different to that of the other flight in order to close the gap between landings. It can also result in a different number of risers.
We used balau stingers, cleats and treads. We left the risers open and installed a balustrade down both sides of the stairs for obvious reasons. The balustrade was also full balau and installed in a vertical picket style with a 102mm capping on top.
The stairs were 1m wide which allows for two people to occasionally walk up and down at the same time. I say occasionally because if it was a busy stair case and people were walking both up and down at the same time regularly then one would need to make the stairs 1.5m wide with a balustrade down both sides. There are other building regulations that stipulate when a hand rail is needed in the middle of the stairs case once it reaches a certain width.
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