Printable View
Hi all,
I am struggling with designing a lifting beam for an offshore platform.
It will be a cantilevered I beam, capable of lifting 4T weight using a pulley on the end, (1500mm from the support). The material will be S355.
Can any one bring me through the calculation/method in order to select the correct I beam please?
Cheers,
Darren
How long is the "tail" of the lifting beam or is it a true cantilever? You'll also need to account for the weight of the lifting gear, stall load and factors of safety.
[QUOTE=Cake of Doom;9334]How long is the "tail" of the lifting beam or is it a true cantilever? [/QUOTE]
To find the loading scenario and a calculator to determine deflection and maximum stress, look here:
[B][URL="https://www.engineersedge.com/beam_calc_menu.shtml"]Beam Deflection and Stress Calculators[/URL][/B]
[quote][COLOR=#333333]correct I beam[/COLOR][/quote][COLOR=#333333]
Ixx and Iyy are the numbers you need to use in the deflection calculators above.
W-Flange I Beam [/COLOR][U][URL="https://-"][B]STEEL BEAM AND COLUMN ANALYSIS / CODE CHECK[/B][/URL]
[/U]or
[B][URL="https://www.engineersedge.com/standard_material/Steel_ibeam_properties.htm"]Wide Flange I Beam Section Properties #1[/URL]
[URL="https://www.engineersedge.com/standard_material/Steel_ibeam_properties_2.htm"]Wide Flange I Beam Section Properties #2[/URL]
[URL="https://www.engineersedge.com/standard_material/Steel_ibeam_s_properties.htm"]Narrow S Flange I beam Section Properties[/URL][/B]
Did you quote the right post for the first quote, Kelly?
[QUOTE=Cake of Doom;9339]Did you quote the right post for the first quote, Kelly?[/QUOTE]
I thought your question was better than the op's. The op will need to be more specific if they are to get help or find the solution.
Oh, I get you now. Last thing on a Friday so I'm allowed to have a "moment".
To the OP: With this being off shore, you'll need to check the specific codes of marine work. It won't be as simple as just sizing a beam to carry 40 kN; they'll be (possibly quite heavy) environmental loads too. There are also different standards for permanent and temporary installations.
As Kelly pointed out above: the more information you can supply, the better the answer will be.