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Semi Circular Cantilever Stair Case

 
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chockalingam
SEFI Member
SEFI Member


Joined: 17 Jul 2014
Posts: 6

PostPosted: Thu Sep 07, 2017 3:07 pm    Post subject: Semi Circular Cantilever Stair Case Reply with quote

Hello SEFIans

Greetings from Chockalingam

Good evening. Hereby I am in need of a small favor. How to design the semi circular cantilever stair? Anybody, please tell me how to proceed in this regard? Thanks in advance. Thank you.
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es_jayakumar
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Joined: 24 Nov 2011
Posts: 1073
Location: Cochin

PostPosted: Fri Sep 08, 2017 4:39 am    Post subject: Reply with quote

Dear SEFIan,
Please post the diagrams of your staircase.

E S Jayakumar
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sasindran_s
SEFI Member
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Joined: 28 Jul 2017
Posts: 7
Location: Chennai

PostPosted: Sat Oct 07, 2017 8:05 am    Post subject: Re: Semi Circular Cantilever Stair Case Reply with quote

Hi,

Please note that API code 650 (design of tanks) is having a procedure for designing the steel circular staircase. The staircase is designed as being supported from the shell of the tank and partially being supported by hanging through the handrail.

If you dont want to adopt this ideology you may design each step as being supported by the central column. Dont forget to consider the handrail load.

w.r.t the placing of the steps its better to draw a preliminary sketch in order to find the length available for welding at the central column. It will help you to determine the diameter of the central column as well. In case if you dont have enough space available for the weld, please increase the welding space at the support location by extending the step at support location. Refer the AutoCAD file attached.

Regards,
Sasindran S


chockalingam wrote:
Hello SEFIans

Greetings from Chockalingam

Good evening. Hereby I am in need of a small favor. How to design the semi circular cantilever stair? Anybody, please tell me how to proceed in this regard? Thanks in advance. Thank you.



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Circular stair-plan.rar
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