anyone done lift plans? 7

[delagina]

I've been asked to do this. Can someone give sample drawings or a guide how to do this.
Before I turn this down, I want to make sure I really can't do this.

 

[SlideRuleEra]

Just to get an idea of the magnitude of this lift I looked up weights for typical 30" steel valves and heavy-wall steel pipe:

30" Flanged, Cast Steel Gate Valve, ASTM Class 300 (Rated about 700 psi at ambient temperature) = 9000 lb.

30" Steel Pipe, Schedule 80 (0.5" wall thickness) = 158 lb/ft (without flanges)

Say the lift is the flanged valve plus a 5', or so, of flanged pipe on each side (to span over the concrete valve supports shown on the drawing).

Total Weight: About 11,000 lb. (9000 lb. + 1000 lb. + 1000 lb.).... not the kind of lift that is usually planned in detail, by an engineering firm, for a qualified heavy construction contractor.

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[andriver]

I don't believe it is allowed per forum policy, although I am willing to lend my services.

 

[delagina]

@andriver, did you receive my email?

 

[gwynn]

Some very good points earlier in the thread. One additional thing to be aware of is that some construction companies/crane companies have internal policies which are more stringent than OSHA etc. The reason I bring this up, is that as SlideRuleEra stated this is not the sort of lift I generally see being sent to an engineering firm. Unless you are near chart capacity due to a long lift radius (most of the time anything over 85% of chart is called a critical lift and requires licensed internal or external engineers do the lift plan).

Some of the big boys in the construction industry have their own guidelines and lift plan requirements. One of these requirements is always that any subs on the job follow those guidelines. It sounds a bit like your client may be a subcontractor who is being asked to provide more information to the general than they are used to. Before bidding anything on this job find out if your client, and/or the general contractor if your client is a sub, have any specific requirements for lift plans. For example, Andriver touched on outrigger/crane track pressure, which is usually a client, owner or site specific requirement. Some companies will also require you to reduce the crane capacity due to wind loads even when the allowable wind speed stated on the plans is less than or equal to the wind speed allowed during lifts by the crane manufacturer. And I'm sure there are other requirements from other companies that I have not dealt with.

 

[chicopee]

Good stuff above, however, from your OP it seems that you need a specific lift plan. Obviously, you'll have to spend the time to develop a specific lift plan from above material presented to you. If I were in your situation, I would contact the business managers of the operating engineers and of the iron workers unions and they may be able to help you out.

 

[delagina]

@andriver, I sent you an email. Thanks,