imaudigger, post: 333648, member: 7286 wrote: you have to quote every single time you respond
It's not as bad as you think. Yes, you have to quote (unless I, too, am missing something), but if you highlight a bit of text -- as little or as much as you like -- before hitting the Reply button, you'll see a tooltip-like +Quote|Reply option pop up. (See screenshot below.) If you then click on Reply in the tooltip, you'll only quote the highlighted text. If you highlight minimal text, you can easily erase it before typing your response.
Jim Frame, post: 333634, member: 10 wrote: OSHA wouldn't like that photo much.
True, But I started surveying before OSHA.
BTDT.
Stephen Ward, post: 333597, member: 1206 wrote: I'm assuming that their compensators are set to "Hell No" or the instrument would've had to be re-leveled every few minutes.
That instrument actually compensates it's angles and pointing when the tripod moves, as long as it's within the 6' compensator range. Apparently Trimble must have solved the vibration problems they had with the early S6 models - they would have just sat and vibrated like crazy on that tripod. The instrument is constantly trying to compensate it's pointing based on the tripod moving, and it used to set up some kind of cycle on tripods that weren't heavy enough to dampen it. And running the legs all the way out like that was a definite no-no.
Roadhand, post: 333635, member: 61 wrote: He's tied off. Theres a lifeline that runs along the cap
funny I don't see a harness
Mike Falk, post: 333876, member: 442 wrote: funny I don't see a harness
I can see how that picture could have you mistaken because of the angle of the photograph. When I took it I was standing closer to the columns so that the bent cap appeared taller than it actually was. He was only about 19 ' above ground level. It is deceiving but there is one there. OSHA , like most regulatory agencies, provide minimum standards and our safety policy well exceeds those minimums. We 100% tie off on anything over 6' above the ground, not only because it's the right thing to do but it's also a condition of employment.
Stephen Ward, post: 333597, member: 1206 wrote: #1 Use a 1 foot layout rod with a 3 foot extension.
#2 Set your expensive robot 6.5 feet in the air on a rickety tripod with a twisted leg and busted head in 8 inches of gravel where the legs won't hold so you can see the impossibly short rod over the piles of dirt blocking your view into the garage footings.
#3 Watch Surveyor set 5/8" x 18" rebars at each building corner, noting that he took the time to adjust each rebar so that each was on grade and centered on the building corner. While surveyor watches in disbelief, use vice grips to remove surveyor's rebars and replace with mag-hubs.
#4 Randomly choose one of the mag-hubs to hold as your base point then use an uncorrected steel tape to check/adjust the position of the next mag-hub to match the plan dimension. Preferably you should choose two hubs that are on the short axis of the building.
#5 Resect off of the chosen two hubs using your office calculated positions. (It'll work great since you've made sure that the distance is correct.)
#6 Stake out and adjust remaining hubs as necessary. (Confident that all must be good since you've hit all the correct buttons in the proper order.)
#7 Relocate instrument and resect again with poor geometry so that you can stake the obstructed points with that ridiculously short layout pole. (Ignore the sobbing surveyor sitting in the shade watching the show.)
That's my rod and tablet in the right edge of the photo.Note that the legs are fully extended, tips set too close together, and the left leg is twisted like a wet 2x4. They were using a 1 foot SECO pole with 3 foot extension. The bubble would've been 8-10 inches above the ground with the prism at 4 feet above ground. Below is a close up of the tripod head on the twisted leg.
The instrument is a Trimble SP something. I'm assuming that their compensators are set to "Hell No" or the instrument would've had to be re-leveled every few minutes.
I was working for the excavator and he was required to have the building corners marked before turning the site over to the wall contractor. Lord help the person that calls me and tells me that this house is out of square.
I'm SURE you'll get blamed when it doesn't work out o.O
Mike Falk, post: 333876, member: 442 wrote: funny I don't see a harness
I don't see them either, but they are around, using their Technology, reading our posts and sending us T-shirts...:angel:
I grinned when I first read the post, then following a link in an email I received made me cringe, not grin.
The spread of the legs are the first commentted on, but I was looking at another site elsewhere on investigative Police work and use of survey equipment.
The photo showed an officer standing behind a TS, its legs probably would fit a 1/2 metre circle, nearly collapsed (right in) so he could setup at eye height (short bloke).
I could see a smart lawyer taking him to pieces and the case thrown out.
Poor procedures, what effect would such have on measurements, is there any likelihood your observations could be compromised etc etc.
I've done enough of that and sat in the "expert witness" box to know how it works.
Someone should train those forensic police in proper survey procedures as should the user in that original post picture.
Roadhands post #6 reminds me of early bridge setout where we'd scale the crosshead from a series of ladders, T1A over shoulder, on its legs, setup on top, often 4 feet wide, with just enough room to dance around to setout the pads along the crosshead 90å¡ to alignment.
Throw the chain up and measure pier to pier.
No scaffolding of any worth, no harness. Mm. Makes me shudder now.
We had an engineer once send the lot crashing to the rocks below.
I can remember back to the late 70s and being the only agile member of the crew that could make the climb or get to where a shot needed to be taken and any "whitehats" would leave the area during that part of our day.
My only reward was that the PC would pay for that days meals and an ample supply of drinks at the bar for that day.
😉
Dam impressive that road project, and an insane deadline. That would be a 5-8 year project in this country, but would never happen, as our planning authorities are not building any new roads to deal with increasing traffic growth, but have chosen to invest in mass rapid transit systems to put everyone in busses .... guess one day I will be getting to site via bus or bicycle.
You gotta love wall contractors... roughly ten years ago we were tasked with notching the footer and putting in offset stakes for a large home improvement store (think orange) being built. We notched the footer in the appropriate places and set 10 foot double offsets at the main corners. We move onto our next job site and our boss receives a phone call from the site super that his wall contractor is on site and we messed up our layout by 2 1/2" inches. We head back to the site and there is the wall contractor with his total station set up over the notch at one of the main corners. We go over and talk to him and ask him to show us what he found. He proceeds to backsight the 10 foot offset hub and tack that is on the projection of the front face of the building turns 180 and asks his co worker over the radio how far he is off the notch for the other building corner that is around 400 feet away. Now the "error" has grown to 3 inches. I just start laughing and ask him to try backsighting on the notch that is 400 feet away, turn 180 to look at the hub and tack and tell me what he is looking at. He told me OK but he didn't see why I wanted him to do that. As soon as he turned 180 and sighted in on the tack he said "Huh" and was scratching his head when I asked him what he was looking at. I got the opportunity to educate this wall contactor that day as to why your backsights should always be longer than your foresights. I left him my cell number and told him to give me a call if he had any more questions. He called later that day and let me know everything looked great.
Lee D, post: 333827, member: 7971 wrote: That instrument actually compensates it's angles and pointing when the tripod moves, as long as it's within the 6' compensator range. Apparently Trimble must have solved the vibration problems they had with the early S6 models - they would have just sat and vibrated like crazy on that tripod. The instrument is constantly trying to compensate it's pointing based on the tripod moving, and it used to set up some kind of cycle on tripods that weren't heavy enough to dampen it. And running the legs all the way out like that was a definite no-no.
That's an SPS630 instrument I believe. I am pretty sure they don't have "surepoint". The angles will still be compensated for mislevelment though. (is that a word?!)
David Powell, post: 334097, member: 6431 wrote: You gotta love wall contractors... roughly ten years ago we were tasked with notching the footer and putting in offset stakes for a large home improvement store (think orange) being built. We notched the footer in the appropriate places and set 10 foot double offsets at the main corners. We move onto our next job site and our boss receives a phone call from the site super that his wall contractor is on site and we messed up our layout by 2 1/2" inches. We head back to the site and there is the wall contractor with his total station set up over the notch at one of the main corners. We go over and talk to him and ask him to show us what he found. He proceeds to backsight the 10 foot offset hub and tack that is on the projection of the front face of the building turns 180 and asks his co worker over the radio how far he is off the notch for the other building corner that is around 400 feet away. Now the "error" has grown to 3 inches. I just start laughing and ask him to try backsighting on the notch that is 400 feet away, turn 180 to look at the hub and tack and tell me what he is looking at. He told me OK but he didn't see why I wanted him to do that. As soon as he turned 180 and sighted in on the tack he said "Huh" and was scratching his head when I asked him what he was looking at. I got the opportunity to educate this wall contactor that day as to why your backsights should always be longer than your foresights. I left him my cell number and told him to give me a call if he had any more questions. He called later that day and let me know everything looked great.
I mentioned to them that their tripod needed to be repaired/replaced, that setting the instrument lower with a wider base would be far more stable, and that they should tie into the longest line of the house using my points to reduce error. Their lead guy had only been with the company six months so he listened to my comments but proceeded to do the work how he had been taught.