avoidthelloyd
Active Member
Calling all guys who like to figure things out.
Pardon my ignorance here, but I want to get some feedback from you all regarding a situation I had a couple days ago. I have done a LOT of construction staking with my LS+ in past 8 years. Just so everyone knows, it has been banged up some and sent to the shop a few times, etc. As you know, when you visit your construction sites, you check in to your control points to make sure you are good to go before staking. I do not recall having any issues like this in the past on previous jobs using my LS.
On this trip, I tied into the control with about 0.08' elevation bust. I found that the tip of my rod was dull and after re-measuring my rod, it fixed most of that. This was about 10am in Oklahoma on Wednesday. I set the building corners to FFE and some other items requested. After I left and got to my next stop, I was called and told that my elevations were off according to the dirt guys.
I returned and used the same setup. It turns out that the dirt guys had a bad FFE elevation in their model so our fills were not gonna match, BUT when I shot the same corners I had just set about 2 hours previously, my elevations were about 0.16' different now? About 12:30pm.
I had a row of trees south of my base at about 45 vertical degrees. I went back and added a meter pole under my base to increase the sky view. I went back, tied the control again with about 0.08' off vertical and saw the same results.
I moved my T3 base to another control point and rechecked at about 3pm and I was almost 0.20' vertical different from my initial staking. I did change rods here, but remeasured the HR. This was pretty consistent across all the nails I set that morning.
Like I said, I have not experienced this scenario before and am very careful and routine in my setups and HI/HR vertical measurements. My question is, am I expecting too much from my LS? Why haven't I had this much discrepancy in the past? I use simple manually calculated points to stake to.
It's wide open sky view and I used both precise topo and boundary profiles and got the same elevations. I'd appreciate any insight, thoughts or feedback.
Pardon my ignorance here, but I want to get some feedback from you all regarding a situation I had a couple days ago. I have done a LOT of construction staking with my LS+ in past 8 years. Just so everyone knows, it has been banged up some and sent to the shop a few times, etc. As you know, when you visit your construction sites, you check in to your control points to make sure you are good to go before staking. I do not recall having any issues like this in the past on previous jobs using my LS.
On this trip, I tied into the control with about 0.08' elevation bust. I found that the tip of my rod was dull and after re-measuring my rod, it fixed most of that. This was about 10am in Oklahoma on Wednesday. I set the building corners to FFE and some other items requested. After I left and got to my next stop, I was called and told that my elevations were off according to the dirt guys.
I returned and used the same setup. It turns out that the dirt guys had a bad FFE elevation in their model so our fills were not gonna match, BUT when I shot the same corners I had just set about 2 hours previously, my elevations were about 0.16' different now? About 12:30pm.
I had a row of trees south of my base at about 45 vertical degrees. I went back and added a meter pole under my base to increase the sky view. I went back, tied the control again with about 0.08' off vertical and saw the same results.
I moved my T3 base to another control point and rechecked at about 3pm and I was almost 0.20' vertical different from my initial staking. I did change rods here, but remeasured the HR. This was pretty consistent across all the nails I set that morning.
Like I said, I have not experienced this scenario before and am very careful and routine in my setups and HI/HR vertical measurements. My question is, am I expecting too much from my LS? Why haven't I had this much discrepancy in the past? I use simple manually calculated points to stake to.
It's wide open sky view and I used both precise topo and boundary profiles and got the same elevations. I'd appreciate any insight, thoughts or feedback.