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3) Use string lines to mark out your building foundations

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3) Use string lines to mark out your building foundations

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Use corner pins to mark out the terrain, plus a land area can be added to the entire terrain.

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VASALLO TORRES JOSE
CHAUCA MEJIA THALIA
ROJAS PULACHE GIULIANO

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-Pegs are inserted deep and poured.
-Building Control once you have visited, you are ready to pour the shoe.

-Put depth pegs in the trenches to see how deep it will go. Marking the sides (with marker paint) of the trench can also work.

-If the site is difficult to access, a concrete pump is considered.

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You must be clear about the design of the building, to remove the correct amount of earth, know the correct amount of concrete, stones and steel that enters the footing and foundation.

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1. Start biulding foundations by marking out a level datum point

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1. Start biulding foundations by marking out a level datum point

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Elevation and distance data must be taken from the building site with the intervention of a surveyor.

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Steps in the preparation for construction project

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Steps in the preparation for construction project

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6. Start digging the foundation trenches

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6. Start digging the foundation trenches

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-Set the site level to the depth you need to dig and check often.
-The control inspector must decide how far down you have to go, inspect at this stage and advise.

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4. Mark the trenches for the foundation of your building

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4. Mark the trenches for the foundation of your building

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- Their bases are aligned referring to their datum point (the tracing is done with powdered chalk)
-The simple way to do it is using the Pythagorean theorem.
-Most modern laser levels have a square
function that does this for you.

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-Once the two lines set at 90º have been obtained, the others can take measurements from this point, with marked corners and crosses.
-It is preferable to mark excavation center lines, or both sides of the trenches.