Hi guys

Thanks 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 done this a long time ago for a couple of floors. And as I remember we just had 4 penetrations and used the plexiglass glass points as resection control.

Thanks guys.

This Content Originally Published by a land surveyor to Land Surveyors United Network

Views: 216

See Your Saved Posts Timeline

☇ Reply to this

Replies to This Discussion

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 that the decking can be prone to movement and may need to be checked as it is being completed...

Good luck

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 your internal targets. Now you must check your lower targets for movement. Marking where the plumb center is on any upper floors then removing it , then placing it back does not mean it has not move. You must re- target a permanent lower target ,that you know has not move to replace , that target again, then move up to the next floor or targets. So what is the distance  range of your laser and the Accuracy Factor, you must stay in that, to set up what floors have a permanent target to extend upward, and these still have to be checked, because your building will move. External Face Targets offset scale checks would help you if they are possible. If your laser has any error the farther you use it ,the more you will be out so Turn it 90, then 180  to make sure it lines up.  Corrections must be made, because your building is going to move. Next how far up are you going. how wide is your building Foot print. I will also give you a link to a Civil Engineering site on Control of Verticality  this  has a lot of good info. Every Building is different,so every one of them is a leaning Curve.

 I have never used resections off of Targets, , can you explain?

 I hope this Helps.

http://www.qs4freshers.com/control-of-verticality.html

https://books.google.com/books?id=7I0rBgAAQBAJ&pg=PA269&lpg...

James all this google book is here ,just scroll up then back down and you will see the whole book, the pages you need.

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 windows are to be set out.

For the concrete plan of the building I would obviously plumb down to the lower floor to check before establishing the target on floor above.

My thinking was to do a free station setup resectecting off of the 3 or more plumb targets once setup on he the deck prepour/postpour. Or maybe just setting up over one plumb target and backsighting another? I should be able to see one fixed target on neighbouring building all the way up so can check bearing & coordinates.

For prepour penetrations Setout, with the tolerance not being as high and to save time, I was going to plumb up and bang nails through the ply deck before plumbing cutouts made for postpour plumbing. Hope this makes sense lol

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 suggest  doing it manual and solve these triangles, yourself,   Resections programs use best fit, they will give you a closure, but they also places these coordinates as best fit. if very thing is very close , than that is fine. to compare all your calculations, SAS or resection 2 or3 pt's, do a distance ,distance intersection from all your controls, to compare, there is no program adjustment in it  the same with SAS.. hope this helps.  I  prefer everything at Right Angles, If you can offset your controls to do this.

 also thank you, for your thanks,  and you are a very good Surveyor.

RSS

Where Thousands of Professional Land Surveyors, Students of Surveying and Educators are United through Collaborative Knowledge and Purpose.

Dedicated to the Memory of Skip Farrow (1953-2015)

+ Surveyor Sharer

Drag Button to bookmark bar and view submitted links here.Will soon be moved to a directory

AFGHANISTAN SURVEYORS ALBANIA SURVEYORS ALGERIA SURVEYORS AMERICAN SAMOA SURVEYORS ANDORRA SURVEYORS
ANGOLA SURVEYORS ANGUILLA SURVEYORS ANTIGUA & BARBUDA SURVEYORS ARGENTINA SURVEYORS ARMENIA SURVEYORS
ARUBA SURVEYORS AUSTRALIA SURVEYORS AUSTRIA SURVEYORS AZERBAIJAN SURVEYORS BAHAMAS SURVEYORS
BAHRAIN SURVEYORS BANGLADESH SURVEYORS BARBADOS SURVEYORS BELARUS SURVEYORS BELGIUM SURVEYORS
BELIZE SURVEYORS BENIN SURVEYORS BERMUDA SURVEYORS BHUTAN SURVEYORS BOLIVIA SURVEYORS
BOSNIA & HERZEGOWINA SURVEYORS BOTSWANA SURVEYORS BRAZIL SURVEYORS BRITISH INDIAN OCEAN TERRITORY SURVEYORS
BRUNEI DARUSSALAM SURVEYORS BULGARIA SURVEYORS BURKINA FASO SURVEYORS BURUNDI SURVEYORS CAMBODIA SURVEYORS
CAMEROON SURVEYORS CANADA SURVEYORS CAPE VERDE SURVEYORS CAYMAN ISLANDS SURVEYORS CENTRAL AFRICAN REPUBLIC SURVEYORS
CHAD SURVEYORS CHILE SURVEYORS CHINA SURVEYORS COLOMBIA SURVEYORS COMOROS SURVEYORS
CONGO SURVEYORS DEMOCRATIC REPUBLIC OF THE CONGO SURVEYORS COOK ISLANDS SURVEYORS COSTA RICA SURVEYORS COTE D'IVOIRE SURVEYORS
CROATIA SURVEYORS CUBA SURVEYORS CURACAO SURVEYORS CYPRUS SURVEYORS CZECH REPUBLIC SURVEYORS
DENMARK SURVEYORS DJIBOUTI SURVEYORS DOMINICA SURVEYORS DOMINICAN REPUBLIC SURVEYORS ECUADOR SURVEYORS
EGYPT SURVEYORS EL SALVADOR SURVEYORS EQUATORIAL GUINEA SURVEYORS ERITREA SURVEYORS ESTONIA SURVEYORS
ETHIOPIA SURVEYORS EUROPEAN UNION SURVEYORS FAROE ISLANDS SURVEYORS FIJI SURVEYORS FINLAND SURVEYORS
FRANCE SURVEYORS FRENCH GUIANA SURVEYORS FRENCH POLYNESIA SURVEYORS GABON SURVEYORS GAMBIA SURVEYORS
GEORGIA SURVEYORS GERMANY SURVEYORS GHANA SURVEYORS GIBRALTAR SURVEYORS GREECE SURVEYORS
GREENLAND SURVEYORS GRENADA SURVEYORS GUADELOUPE SURVEYORS GUAM SURVEYORS GUATEMALA SURVEYORS
GUERNSEY SURVEYORS GUINEA SURVEYORS GUINEA-BISSAU SURVEYORS GUYANA SURVEYORS HAITI SURVEYORS
HOLY SEE SURVEYORS HONDURAS SURVEYORS HONG KONG SURVEYORS HUNGARY SURVEYORS ICELAND SURVEYORS
INDIA SURVEYORS INDONESIA SURVEYORS IRAN SURVEYORS IRAQ SURVEYORS IRELAND SURVEYORS
ISLE OF MAN SURVEYORS ISRAEL SURVEYORS ITALY SURVEYORS JAMAICA SURVEYORS JAPAN SURVEYORS
JERSEY SURVEYORS JORDAN SURVEYORS KAZAKHSTAN SURVEYORS KENYA SURVEYORS KIRIBATI SURVEYORS
KOREA SURVEYORS KOREA REPUBLIC OF SURVEYORS KUWAIT SURVEYORS KYRGYZSTAN SURVEYORS LAO PEOPLE'S DEMOCRATIC REPUBLIC SURVEYORS
LATVIA SURVEYORS LEBANON SURVEYORS LESOTHO SURVEYORS LIBERIA SURVEYORS LIBYAN ARAB JAMAHIRIYA SURVEYORS
LIECHTENSTEIN SURVEYORS LITHUANIA SURVEYORS LUXEMBOURG SURVEYORS MACAU SURVEYORS MACEDONIA SURVEYORS
MADAGASCAR SURVEYORS MALAWI SURVEYORS MALAYSIA SURVEYORS MALDIVES SURVEYORS MALI SURVEYORS
MALTA SURVEYORS MARSHALL ISLANDS SURVEYORS MARTINIQUE SURVEYORS MAURITANIA SURVEYORS MAURITIUS SURVEYORS
MAYOTTE SURVEYORS MEXICO SURVEYORS MICRONESIA SURVEYORS MOLDOVA SURVEYORS MONACO SURVEYORS
MONGOLIA SURVEYORS MONTENEGRO SURVEYORS MONTSERRAT SURVEYORS MOROCCO SURVEYORS MOZAMBIQUE SURVEYORS
MYANMAR SURVEYORS NAMIBIA SURVEYORS NAURU SURVEYORS NEPAL SURVEYORS NETHERLANDS SURVEYORS
NEW CALEDONIA SURVEYORS NEW ZEALAND SURVEYORS NICARAGUA SURVEYORS NIGER SURVEYORS NIGERIA SURVEYORS
NIUE SURVEYORS NON-SPEC ASIA PAS LOCATION SURVEYORS NORFOLK ISLAND SURVEYORS NORTHERN MARIANA ISLANDS SURVEYORS NORWAY SURVEYORS
OMAN SURVEYORS PAKISTAN SURVEYORS PALAU SURVEYORS PALESTINIAN TERRITORY OCCUPIED SURVEYORS PANAMA SURVEYORS
PAPUA NEW GUINEA SURVEYORS PARAGUAY SURVEYORS PERU SURVEYORS PHILIPPINES SURVEYORS POLAND SURVEYORS
PORTUGAL SURVEYORS PUERTO RICO SURVEYORS QATAR SURVEYORS RESERVED SURVEYORS REUNION SURVEYORS
ROMANIA SURVEYORS RUSSIAN FEDERATION SURVEYORS RWANDA SURVEYORS SAINT KITTS & NEVIS SURVEYORS SAINT LUCIA SURVEYORS
SAINT MARTIN SURVEYORS SAINT VINCENT & THE GRENADINES SURVEYORS SAMOA SURVEYORS SAN MARINO SURVEYORS SAO TOME & PRINCIPE SURVEYORS
SAUDI ARABIA SURVEYORS SENEGAL SURVEYORS SERBIA SURVEYORS SEYCHELLES SURVEYORS SIERRA LEONE SURVEYORS
SINGAPORE SURVEYORS SINT MAARTEN SURVEYORS SLOVAKIA (SLOVAK REPUBLIC) SURVEYORS SLOVENIA SURVEYORS SOLOMON ISLANDS SURVEYORS
SOMALIA SURVEYORS SOUTH AFRICA SURVEYORS SOUTH SUDAN SURVEYORS SPAIN SURVEYORS SRI LANKA SURVEYORS
ST. PIERRE AND MIQUELON SURVEYORS SUDAN SURVEYORS SURINAME SURVEYORS SWAZILAND SURVEYORS SWEDEN SURVEYORS
SWITZERLAND SURVEYORS SYRIAN ARAB REPUBLIC SURVEYORS TAIWAN; REPUBLIC OF CHINA (ROC) SURVEYORS TAJIKISTAN SURVEYORS TANZANIA UNITED REPUBLIC OF SURVEYORS
THAILAND SURVEYORS TIMOR-LESTE SURVEYORS TOGO SURVEYORS TOKELAU SURVEYORS TONGA SURVEYORS
TRINIDAD AND TOBAGO SURVEYORS TUNISIA SURVEYORS TURKEY SURVEYORS TURKMENISTAN SURVEYORS TURKS AND CAICOS ISLANDS SURVEYORS
TUVALU SURVEYORS UGANDA SURVEYORS UKRAINE SURVEYORS UNITED ARAB EMIRATES SURVEYORS UNITED KINGDOM SURVEYORS
UNITED STATES SURVEYORS URUGUAY SURVEYORS UZBEKISTAN SURVEYORS VANUATU SURVEYORS VENEZUELA SURVEYORS
VIET NAM SURVEYORS VIRGIN ISLANDS (BRITISH) SURVEYORS VIRGIN ISLANDS (U.S.) SURVEYORS WALLIS AND FUTUNA ISLANDS SURVEYORS YEMEN SURVEYORS
ZAMBIA SURVEYORS ZIMBABWE SURVEYORS SURVEYORS

Location Based Surveying Practices

Land Surveyors United is the world's FIRST Global Social Network for geospatial professionals. We have dedicated, geolocated support groups for practically every country, continent and state on earth, for you to utilize for building your personal network. We are all essentially concerned with the same issues, no matter where we are located on earth. However, surveying practices and methods vary depending on the geographic location where we work. If you have noticed similarities and differences between the conditions, laws and practices between two or more areas of the world,discuss it in this forum. Build your reputation online by posting relevant discussions in your local group below.

Join and Introduce Yourself in Your Local Geosocial Forum:

Alabama Alaska Arizona Arkansas California
Colorado Connecticut Delaware Florida Georgia
Hawaii Idaho Illinois Indiana Iowa
Kansas Kentucky Louisiana Maine Maryland
Massachusetts Michigan Minnesota Mississippi Missouri
Montana Nebraska Nevada New Hampshire New Jersey
New Mexico New York North Carolina North Dakota Ohio
Oklahoma Oregon Pennsylvania Rhode Island South Carolina
South Dakota Tennessee Texas Utah Vermont
Virginia Washington West Virginia Wisconsin Wyoming

Not based in the US? Here are other groups for surveyors around the world to join and contribute knowledge and experiences as a land surveyor:

Africa Asia Australia Europe Russia Canada
Antarctica S.America N. America India Malaysia Caribbean

And more... Find your group forum based on location.

Choose Your Equipment Group Here

Handheld US Social Support for Land SurveyorsNIKON Social Support for Land SurveyorsTrimble Social Support for Land SurveyorsTopcon Social Support for Land SurveyorsSokkia Social Support for Land SurveyorsAshtech Social Support for Land SurveyorsNAVCOM Social Support for Land SurveyorsMagellan Social Support for Land SurveyorsLeica Social Support for Land SurveyorsAltus Positioning Social Support for Land SurveyorsMicroSurvey Social Support for Land SurveyorsJuniper Systems Social Support for Land SurveyorsTraverse PC Social Support for Land SurveyorsCarlson Software Social Support for Land Surveyors

what where  
job title, keywords or company
city, state or zip jobs by job search

PLEASE DONATE TODAY. Your generosity preserves surveying and mapping knowledge for future generations. Thank you.

Survey Equipment Troubles?

Geo Visitors Map

Choose Your Group Here

Surveying Equipment Support for Leica, Carlson, Sokkia, Trimble, Topcon, Altus, Nikon equipment


© 2017   © Created by Land Surveyors United   Powered by

Badges  |  Contact LSU  |  Privacy Policy  |  Terms of Service

Live Support