In the past, I've either set out the external corners of the shuttering, or I've just given pile centers for the steel fixers to work from .
This time however, I'm doing a 90m long block of apartments, and the grid lines aren't centred on the piles/beam, and the beams aren't centred on the piles (most of the time).
What method do you use for setting something like this out? I'm leaning towards off setting the likes to outside of beam, then working my way around using brick work measurements, but that's going to be days worth of offsetting in Leica geo office with the potential for any errors carrying forward and requiring the whole thing to be restarted.
I will also add, the company I work for don't have cad. If they did, would it be possible to extract this setting out info from a cad drawing without spending days manually offsetting everything, and turning b/w measures into outside of beam?
the grid lines aren't centred on the piles/beam, and the beams aren't centred on the piles (most of the time).
This sounds like a real cluster-F.?ÿ
I'd probably push to get the company to spring for a CAD package for this.?ÿ The potential liability alone on something this complicated makes it worth the investment.
I would recommend you ask the designer for a dxf file. Then you can do your offsets based on the linework in the dxf.
I would think if there are grid lines, then you have dimensions to piers/piles and beams. Can you not layout the grid lines and the people putting in the piers/piles/beams do their own offsets?
OR
Get the designer in a meeting and ask them how they expect this to be laid out with the information provided. If they want the project to be a success then they need to work with all trades. Just my $0.02.
I would think if there are grid lines, then you have dimensions to piers/piles and beams. Can you not layout the grid lines and the people putting in the piers/piles/beams do their own offsets?
This is the way to go. Besides, once gridlines are set and stringlines run, pulling tape is going to be more accurate than getting the surveyor back on site and setting up again. From a single setup, give them enough gridline intersections that they can pull whatever they need off of those. Keeps it as simple as possible.
I would also add that if it's anything like the projects I work on, the surveyor would be the last to know about planset changes, whereas the beam guys will get the updates first, so let them pull the beam centers from the gridlines, which should not be changing.
I will also add, the company I work for don't have cad. If they did, would it be possible to extract this setting out info from a cad drawing without spending days manually offsetting everything, and turning b/w measures into outside of beam?
How does a survey company, even just for construction, survive without a CAD package? I can't remember the last project I had that could be totally staked from a paper planset...
You don't have to spend days manually calculating anything if you don't want to; just run with the CAD file of the gridlines loaded up on your collector. If they need an intersection staked, or an offset of one or two lines staked, select the lines and calc the intersection on the fly.
That way you're not trying to anticipate what they will want, spending lots of unnecessary time in the office, and cluttering up your collector with tons of points you might not even use. Only calc and stake what they need on site at the time. Considering how often the slab turns into a temporary laydown area for multiple trades, odds are half the points you calc in the office can't be set anyways.
I work for a groundworks firm that's incredibly old school. Before I took over the role, we were using ancient casio handheld computers with a polar program input by some company in Australia (the last ones doing it) so any modernisations (even just using a laptop..) is stuff I've pushed for then taught myself.?ÿ
Maybe I should push for them to get me CAD. The Leica ts06+ we have is utterly hobbled at this point, and the local servicing companies are basically frauds who can't actually repair stuff and basically just clean things saying it's been serviced. When that gets replaced with something that isn't a relic, I believe geo office isn't really even used anymore.?ÿ
I think gridlines might be the way to go, though I fear it's not something hugely practiced in the UK these days so our fixers might not be overly familiar with it.
I think gridlines might be the way to go, though I fear it's not something hugely practiced in the UK these days so our fixers might not be overly familiar with it.
Well, now I'm intrigued.?ÿ I understand staking centre of pile for the excavation.?ÿ Do you restake centre of pile after it has been poured??ÿ What's your usual work flow??ÿ How do the concrete crews and other trades orientate themselves if they are not using grids??ÿ
In my experience (UK based surveyor), grids are still used on most commercial / industrial building projects, but for some reason rarely on residential projects. If you had access to CAD, and had a decent working relationship with the contractor then creating a grid and issuing this as an overlay on the steelwork drawing (and as a dxf to the principal designer) is the route I tend to go down. As this isn't a possibility, I would request from the principal designer that the steelwork drawing for the ring beams be overlaid onto a grid (and dimensioned off this gird), and that this grid be issued as a dxf so that as mentioned before you can set-out the grid lines on site (rebar with centre-punched point over-strung beyond the ring beams as per the first photo attached). Attached is a screenshot of a grid overlaid onto a piling and ring beam drawing on a project I am currently working on, for reference. Cheers!
