Dear Mr Mohamad Naz Ali,
You have already two good responses as above, asking you to provide more details.
In general to start the discussion on scaffolding, there are two basic things you need to know.
I am not an expert in scaffolding but can share with you the following information.
1.0
BASE TO HEIGHT RATIO
If the base unit is one then the height will be four times that.
2.0
LOAD aspects
generally three classes are referred.
LIGHT ... Below 120 Kg / Sq M
MEDIUM .... Upto 240 Kg / Sq M
HEAVY.... Above 240 Kg / Sq M.
Scaffolding details have been discussed many times in Cite HR.
You may type SCAFFOLDING into the box that reads WHAT DO YOU NEED ?
(This box can be found in the title bar above the threads.)
You can then press "reasearch" button.
You will get plenty of information.
All the above can be useful to add to your knowledge.
Before you take any practical steps in the field please take the advise of an expert.
V.Raghunathan