bollard steel to aluminium

[nithink55]

Hiii

i have designed bollard(mooring-single type) using jis and bv rules.
but this bollard is for aluminium ship so i have to convert the pipe. in steel i got 125DN sch.40 can you tell me to find the dia and thickness of aluminum pipe.

is there any other method to design the bollard.
please help...
thanks in advance.

nithin

 

[hydtools]

This may be a good read.

http://www.maritimeinternational.com/Resources/Mooring Bollards/Introduction.pdf

Reduce the rating of the aluminum bollard by the ratio of aluminum yield strength/steel yield strength. Assuming yield was the design criterium.

Ted