Tie-In CL Elevation Verifications

[SkinFrictionMan]

I'm on a facilities project with several above grade tie ins coming up. Each tie in is new to old with a flanged spool piece getting dropped in during the outage. In the weeks leading up to the outage, the Operations group is requesting recurring checks on centerline elevations to ensure they don't run into any issues lining up the spools during the time sensitive shutdown. Is there a quick and dirty way to perform these checks using a level, tape, T square, string, center finder, etc. rather than setting up the level and rod at every spot and shooting elevations? This will occur when the surveyor is on site but I'm just looking for an old fashioned welder's method to have another paper trail of QA/QC documentation.

(The basis for this is historically poor soil conditions at said tie in location)

Thanks, appreciate any feedback.

 

[BigInch]

No. With a history of settlement of poor soils, any documentation would presumably be old enough to not include any new settlements. They can start and stop, or continue with changes of moisture in the soil. I've seen some settlement of gas plants that approached 1" per month from time to time. Get the level instruments, or a laser scanner and get them to work or do it just before construction.

 

[SkinFrictionMan]

Thank you BigInch. I agree, it makes sense to simply get your take-offs done right before the tie-in occurs, but the client is requesting a log to see what kind of settlement/floating patterns are going on. Not a bad set of information to have I suppose for future design purposes.

 

[KevinNZ]

You can use a laser level from a datum next to one side of the tie-in across to a mark on the other tie-in location.