Can anyone out there please help me?
For ages now I've been looking for simple formulas for calculating Mmax for simple beams with more than 2 point loads, for example multiple beams on girders. Text books etc only ever seem to list formulas for 2 loads.
What if I have 5, 6, 7 etc?
I did find...
Something I've pondered for a long time:
Why don't the DNV rules (2.7-1) check for "tensile tear-out" and only "shear tear-out"? As I understand there are a number of failure modes of a lug, bolted connection etc. Typically the 3 checked are shear, tensile and bearing.
The allowable stress...
Are there any rules of thumb when it comes to fillet welding plates of different thicknesses?
I require the minimum thickness of plate to weld a lifting lug to. The lug is to be 16 mm grade 250 plate. The obvious solution would be to use 16 mm under it as well, but is that necessary, or...
OK. So a little more complex than I first anticipated. Had a feeling it may be. Any chance someone could post the appropriate formulas for this loading case?
The 98.1 kN already has a 2.5 safety factor on it - as per applicable Standard.
Regards.
Thanks folks for the replies. I will post a complete solution when back in the office on Monday.
Question: do I take the whole length for the cantilever, or just the 2800 mm cantilevered section? Perhaps a stupid question - I would say just the 2800 mm section.
Kind regards.
Hoping someone can help me out here. See attached loading for a simple fork jib.
With the steel section having a section modulus of 430 E3 mm^3 and 98.1 kN at free end I calculated Mmax = 276.6 E6 kNm and bending stress fb = 643.2 Mpa. Too high I realise and have since beefed the section up...
This is purely an access platform to clean out a hopper. No actual access into the hopper it simply sits beside the hopper.
What is the "IBC" forum?
Regards.
AS1657 says "unless otherwise approved by the regulatory authority, the head clearance shall be not less than 2000 mm measured vertically from the nosing of the tread."
I have a specific application requiring a stairway/landing at 1500 mm high. Does that mean I cannot design and build it?
To...
The Spreader Beams vary from 100 kg WLL anywhere up to 50 Tonne. The computations are completed by myself and all welds are completed by DNV qualified welders.
The current beam we are fabricating has 6 mm fillet welds specified.
Thank you all for your insight.
I take it there is no...
We are currently building a number of beams that are then obviously proof load tested.
My boss insists on having the lug welds UT (Ultrasonic Tested) prior to proof load test, then MPI (Magnetic Particle Tested) after proof load test.
Other than as a health and safety concern I do not see the...
Good day folks,
I have a question I am hoping someone can help me with. The attached file shows an isometric of a clevis assembly we are building.
It will have a sideways load of 50 Tonne on it (shear on weld).
I would like to know how to do a weld check on the bottom pin - 90 mm diameter. I...
AS4991 (Australian Standard) Lifting devices states that:
Where a lifting device is being used for general application, it shall be capable of withstanding -
a) a minimum design load of 1.5 times the capacity.
But then states:
Lifting devices shall be proof loaded in accordance with the...
The tank is to sit inside a frame, so the calculation is to determine the amount of columns I need down the sides. Tank is approximately 10 metres long. The tank wall is to be 6 mm plate.
For the sake of simplicity would it be wise to use an evenly distributed load of 1.5 x H x 62.4 pds per...
