How to correct the out of the plumbness of column during erection
How to correct the out of the plumbness of column during erection
(OP)
Hi Everyone,
I need help on how to correct the out-of-plumbness of column. During the erection of a stair tower module, the survey shows that the column is way out of the H/500 plumbness at each level, and out of plumb in different directions.
Much appreciated that you can shed some light on proposal in correcting those out of plumnbess of column?
Thank you
I need help on how to correct the out-of-plumbness of column. During the erection of a stair tower module, the survey shows that the column is way out of the H/500 plumbness at each level, and out of plumb in different directions.
Much appreciated that you can shed some light on proposal in correcting those out of plumnbess of column?
Thank you






RE: How to correct the out of the plumbness of column during erection
RE: How to correct the out of the plumbness of column during erection
RE: How to correct the out of the plumbness of column during erection
Mike Halloran
Pembroke Pines, FL, USA
RE: How to correct the out of the plumbness of column during erection
Usually a plumbing and rattling gang takes care of making sure each level of construction is plumbed properly and then torques bolts prior to moving on to the next phase.
RE: How to correct the out of the plumbness of column during erection
The St. Louis Arch was slightly out of alignment when they "closed" the top. Actually wasn't too far off considering it is 630' tall and 630'wide and done without lasers, etc They used specially constructed hydraulic jacks to push and shove the two legs into place and "popped" the last piece in place.
RE: How to correct the out of the plumbness of column during erection
RE: How to correct the out of the plumbness of column during erection
Actually - both
The south leg started to heat up with the sun rising and of course gravity "pulled" the legs together. Firefighters hosed the south leg - but could only reach up so high. They were also slightly off up/down and left/right - but nothing much!!
If you ever visit the Arch - stay and see the 30 minute movie on its construction. Quite amazing. They show it on the Discovery or TLC channel from time to time.
Most amazing - no one died during construction. If you watch the movie you will notice a lack of hard hats, safety belts, tie-offs, etc and NOTHING on it was level or square!!
RE: How to correct the out of the plumbness of column during erection
RE: How to correct the out of the plumbness of column during erection
I will have to discuss with the client to see whether they accept the "out-of-plumbness" if the structures is checked and and found sound after considering this "out of plumbness".
RE: How to correct the out of the plumbness of column during erection
RE: How to correct the out of the plumbness of column during erection
John Southard, M.S., P.E.
http://www.pdhlibrary.com