yep - bad choice of word- "winning" -
40,000 POINTS - CONSTRUCTION STAKING $?>Kent Hit
foggy -i somewhat agree, but i woud want "evidence" that the point was staked, therefore I would shoot/store the point
Surprised no one has suggested a GPS stake out. Given the quoted tolerance it might be ok with some precautions, ie set out regular corner/check points using a TS and work between them. Stake and store would be quick. Keep the pole short so the antenna is just above head level, use an accurate bullseye bubble and keep an eye on hdop and sd.
40,000 POINTS - CONSTRUCTION STAKING $?>Kent Hit
> the Nail on the head though.... why shoot these all in? Tape and transit
I'd bet that tape and eyeball would be found to be good enough for what is needed as long as some grid lines at 100' x 100' or more are first surveyed by total station to get them perpendicular and check spacing.
My assumption is that the whole site will be graded smooth, no brush or loose rock. Tape city!
Ought to hire a farmer to do it. They lay out crops and orchards all the time and very accurately.
Sure if you have to stand behind the instrument and turn in every angle it would be slow but with a robot I would use two people, one on the pole and one on the ground pounding nails.
It would go fast because once you have enough points set the pole would be roughed in by eye and then have it continuously update so you just move in until you get close enough, drive that one in.
You would be surprised how fast you can go with a robot if you aren't building a Swiss watch. The machine can turn and shoot way faster than you can especially when it tracks the target.
My brother had a summer job working as a rear chainman on a survey crew in the 1960s staking orchards in Kern County. Hot miserable work, he joined the Navy after that.
40,000 POINTS - CONSTRUCTION STAKING $?>Kent Hit
> i woud want "evidence" that the point was staked, therefore I would shoot/store the point
You'd just make field sketches to show the order of filling in grid points within the grid lines. The real purpose would be to keep track of daily progress, but it would also double as evidence.
It would be interesting to compare output. If the site is not graded smooth and free of vegetation, all bets are off with tape and transit/theodolite/total station methods.
Takes a tough crew
One needs a really fit crew to do this, especially if the weather is hot. All that bending and kneeling and then popping back up will soon take it's toll. Had a young man in great condition nearly pass out in mid-July doing similar layout in a cemetery.
> My brother had a summer job working as a rear chainman on a survey crew in the 1960s staking orchards in Kern County. Hot miserable work, he joined the Navy after that.
Hot miserable work describes almost all outside work in the summer in Kern County, CA.
It gets a tad warm there.
I might be able to do it for $2 a point, but I think I'd want more, maybe more like $4 to $5 a point. I agree the winning bid is pretty cheap.
Could this be adaptable by persuading the contractor to use colo(u)red screws ?
http://www.strongtie.com/products/quikdrive/index.html?source=topnav
Cheers,
Derek
John Deere technology and planting equipment, modified to place whiskered nails by air stapling.
7 points per minute,
95 hrs
$150/hr
$14,250
~ $0.36/pt
Anything more would be pure profit.
Takes a tough crew
I'm thinking if the ground is basically level and clear; double chain the points and paint dot it. If all they are doing is drilling for a post, why set a nail? Stay a day ahead of the drill crew. Maybe do it BLM style.
Still the 'winning' bid was pure desperation. Take a photo and there is the cut-sheet. Pretty lame, but for that price that would be what they paid for.
The up/down would absolutely be a crew killer for that many points. :excruciating:
40,000 POINTS - I will take it!
> we really got some varying numbers here- my hypothetical bid was $8.25 +/- per point-
> keeping in mind everyone has different methods- conventional with a guy behing the gun, robotic, on site setup time, etc-
> winning bid? - $1.26 per point
Let me play the other side of this. I would love $8.25 per, but another way to look at it is:
If my math is right....
$1.26 * 40,000 = $50,400.00
and you set one every 60 seconds that would be $75.00 per hour.
(This would be low even for a solo guy working out of his bath tub and to low for me)
BUT...
If I did one every 45 seconds:
3600sec/45sec = 80 per hour
40,000/80 = 500 hours
$50,400/500hrs = $100 per hour.
$100/hour is still lower than I bid the small one or two days jobs I typically get. However, as slow as things are, I would jump on a 3 month job with this kind of pay.
And Yes, my robot, me on the rod and helper pounding can do one every 45 seconds, easy!
> >winning bid? - $1.26 per point
>
> That ain't winning
no its stupid and a shame that someone thinks they could do it for that.
Kent hit the nail on the head. Tape and string line is way to go.
> Plus I'd have to count on hiring and training a new crew once the one I assigned to the job quit out of boredom
😀 :good: 😀
When someone ask why construction staking is my least favorite kind of surveying work. I look at them and make a "Beep - Beep" sound of those awful backup horns. :pissed:
We do a ton of "geo-pier" work and it is similar to this. We get our 60d nails within 0.05'. Kens way is best, and that's how we do it. My best day was 9 hours long, and we got about 900 in. They design these piers sometimes 3-5 wide on a column line as well. If it were single file like is described here you can do more than that in a day. It goes very quick when your I man(or robot) does not have to turn an angle.