LATTICEWORK STEEL STRUCTURE - MAST 2

[JJAV1983]

Hello,

I was hoping you can help me by letting me know under which standard the attached steel structure should be built under.

The structure is made out of steel A500B.

Thanks a lot,

JJAV

 

[JStephen]

Generally, that would be based on the function and on what it is a part of, also on the country where it was built and/or used.
There are standards for structural steel for buildings, for antenna towers, for transmission towers, for different kinds of cranes and derricks, etc.

 

[msquared48]

I agree with JStephen.

Is this for oil and gas, water, or a wind mill?

Mike McCann, PE, SE (WA, HI)

 

[JJAV1983]

Hi JStephen - msquared48

This is going to be mounted on an International Workstar 7400 truck which is part of a Geotechnical drill serving in Canada.

The industry serving: Environmental and Geotechnical drilling.

JJAV

 

[dhengr]

JJAV1983:
That looks like a side boom for a pipe laying tractor to me. Ah…, now you tell us, you seem to indicate that it might be a piece of oil field equip. or some such, a boom, to be mounted on the back of a straight , flat bed, work truck for Geotech. drilling operations. It always flabbergasts me that people assume that there should be an exact/specific std. for every imagined design concept or piece of equip. I suspect that some significant percentage of these booms have been designed and built in contractors shop yards, maintenance or machine shops. I’m sure there are some of these booms commercially available. I would look around and see how they are generally designed and built. I would look at some boom stds., and the like for some guidance, along with our regular structural steel and welding stds. Do have a few good textbooks on Engineering Mechanics, Strength of Materials, Welding Design, and Machine Design on hand. And with that, I would be perfectly comfortable using first principles and just plane good engineering design, detailing and welding design and detailing to build something like this. Good clean detailing, welding and fabricating are just as important as some std. preset allowable stress/strength, give or take a few percent and some reasonable safety factors. You have to set your load limits, conditions of use, lifting arrangements, etc., based on the base truck, the boom mech. equip., and your field conditions, otherwise, those are really quite variable.

 

[chicopee]

So it is a boom to be mounted on the back end of a truck, check out the ANSI standards.

 

[JStephen]

It might fall under this standard:

https://www.asme.org/codes-standards/find-codes-standards/b30-6-derricks

I note that it includes gin poles, for example.
If you're designing from scratch and building a bunch of them, definitely research the standards.
If you're adapting some existing equipment or shop-building a one-off item, I'd say that's less critical.

 

[TimSchrader2]

Hello

So, It is truss type boom for a drill rig. You will need to define the loads. Worst case load is probally when the bits gets jammed on something and the torsion goes to the boom. You could start with with that torque.

I am doing a telescopic truss boom and found the frame generator in ACAD inventor quite usefull. it will do all the mitered cuts and notched joints. Then analze the stresses quite quickly on something like that.

 

[JJAV1983]

HI TimSchrader2 - JStephen

Thank you for your suggestions, it has been brought to my attention that the best standard when fabricating and designing something like this is API-4F (Drilling and Well servicing structures) just for your future reference.

Cheers!