James
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Optical/laser plumb with plexiglass

Started this discussion. Last reply by Billy Brooks Sep 27, 2016. 4 Replies

Hi guysThanks to those of you who helped me out with a similar question I asked a while back.When plumbing up through penetrations using laser/optical, do you guys fix the plexiglass on the floor…Read more →

Subject Tags: control, penetrations, laser, Optical

Survey Penetrations & Jumpform

Started this discussion. Last reply by Billy Brooks Sep 1, 2016. 5 Replies

Hi I'm hoping you guys can help me out regarding a couple of best practice questions in particular survey penetrations on concrete building structures and also lift/stair jumpform.Have done setout…Read more →

Subject Tags: Jumpform, Penetrations, Construction

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Erwin Vasquez favorited James's discussion Optical/laser plumb with plexiglass
Oct 24, 2016
James's discussion was featured

Optical/laser plumb with plexiglass

Hi guysThanks to those of you who helped me out with a similar question I asked a while back.When plumbing up through penetrations using laser/optical, do you guys fix the plexiglass on the floor above permanently or do you draw round it or something once positioned correctly in order to replace it in the same position when sighting down on it later on for plumbing up to the next floor?Also does the plexiglass technique work when setting out on floor above before slab has been poured.I have…See More
Sep 28, 2016
Billy Brooks replied to James's discussion Optical/laser plumb with plexiglass
"Hi James ,you sound like you have everything in control, I did not mention the nails ' I knew it was covered in both of the links i gave you. if there is no other way, to see your Target  controls, a resection will have to do, but i…"
Sep 27, 2016
James replied to James's discussion Optical/laser plumb with plexiglass
"Thanks for your advise guys much appreciated. Also thanks Billy for you're info & Links. I realise with movement in the concrete that plumbing control & grids will have to be reestablished from the ground up when internal works such as…"
Sep 27, 2016
Billy Brooks replied to James's discussion Optical/laser plumb with plexiglass
"Hi James, NO target is permanent, until you are sure it is not moving anymore. As your building grows, the bottom floors will load and the upper will lean and sway. The method you are using without any external off set scale face targets to check…"
Sep 27, 2016
Christopher James Drayton replied to James's discussion Optical/laser plumb with plexiglass
"I used a similar method many years ago. The plexiglass had a cross scored into the surface from edge to edge so that reference marks can be made on the floor so that it can be repositioned later in the same place. As for plumbing up, just remember…"
Sep 27, 2016
James posted a discussion

Optical/laser plumb with plexiglass

Hi guysThanks to those of you who helped me out with a similar question I asked a while back.When plumbing up through penetrations using laser/optical, do you guys fix the plexiglass on the floor above permanently or do you draw round it or something once positioned correctly in order to replace it in the same position when sighting down on it later on for plumbing up to the next floor?Also does the plexiglass technique work when setting out on floor above before slab has been poured.I have…See More
Sep 25, 2016
James is on spot light
Sep 2, 2016
James's discussion was featured

Survey Penetrations & Jumpform

Hi I'm hoping you guys can help me out regarding a couple of best practice questions in particular survey penetrations on concrete building structures and also lift/stair jumpform.Have done setout before on concrete structures with only up to 5/6 floors by resecting from fixed control on neighbouring buildings, however on higher structures, once control is no longer visible i will be plumming up using penetrations in the floor slabs which i've not done before. I'm wondering the best way of…See More
Sep 1, 2016
Billy Brooks replied to James's discussion Survey Penetrations & Jumpform
Sep 1, 2016
Billy Brooks replied to James's discussion Survey Penetrations & Jumpform
"Auto Plumbs and…"
Sep 1, 2016
Survenator favorited James's discussion Survey Penetrations & Jumpform
Sep 1, 2016
Billy Brooks replied to James's discussion Survey Penetrations & Jumpform
"Hi James, How did you start this building. Was controls set on the first floor ,are you not using a Auto Plumb or laser, This should have been from day one,where these points are set, If purpose-made apertures are not permitted then sight lines can…"
Sep 1, 2016
Michael Alan Sanchez replied to James's discussion Survey Penetrations & Jumpform
"I can only reiterate the methods I have previously posted. Procedure for HiRise layout and control: 1: Using site control or property corners, layout the primary sides of the building  on a convenient offset (envelope-in this case I will use…"
Aug 31, 2016
J. Anthony Cavell replied to James's discussion Survey Penetrations & Jumpform
"Dear James, I have not set control for a tall multi-story building so what I write may need to be taken with a grain of salt. If you have penetrations between floors, are you able to drop a long plumb bob through the several floors to prove…"
Aug 31, 2016
James posted a discussion

Survey Penetrations & Jumpform

Hi I'm hoping you guys can help me out regarding a couple of best practice questions in particular survey penetrations on concrete building structures and also lift/stair jumpform.Have done setout before on concrete structures with only up to 5/6 floors by resecting from fixed control on neighbouring buildings, however on higher structures, once control is no longer visible i will be plumming up using penetrations in the floor slabs which i've not done before. I'm wondering the best way of…See More
Aug 31, 2016

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