How to get Take-Off qty’s???

Hi Richard,





Depends on whether the take off is for planning purpose or costing/payment purpose.



Good to read Principle of Measurement International (POMI)

or Standard Method of Measurements(SMM7) etc to get good understanding. I don’t know what measurement standards are practiced in USA.



HOPE THIS HELPS





Sam

Try this one. This works for me in Autocad VBA



Sub Get_distance_polyline()

Dim entry As Object

Dim lineLen As Double

Dim totalLen As Double

On Error Resume Next

For Each entry In sset

lineLen = entry.Length

totalLen = totalLen + lineLen

Next entry

MsgBox "The total Lenght of all lines is: " & Round(0.001 * totalLen, 2), vbInformation, "Total Length "



End Sub



regards

intially u should have imaginate about the structure. then automatically it will show what’s Qty and how to get. without that i cant say anything because its not a software calculating wt like.

If you want an accurate measurement of quantities you have to take into account not only every drawing and spec but also every standard used in the proyect.

If you dont need to be so near of the truth or maybe the project is not so advance maybe ratios can help you to have in mind what is the overall amount of work to be done.



It is easier and sometimes, as far as statistics are near reality, it works.

In order to take off quantities, you have to gain exprianse in the following:

Analizing the contract drawings.

Knowing the basic measurement techniques and methods including the traditional ones.

Making work breakdown structure(WBS).

Collecting the required activities and doing proper identifications and dicritions in separate items with related uints of mesuremants.

Using AUTO CADD software.

Analizing the provisional sum and the general items.

I suggest to study how to read a tecnical drawings (mechanical, piping, eletrical, structure ...) There is a lot os curses and books for this.



Regards.

Hi Richard



Try the traditional way, get a full set of full size drawings, (avoid having on A3 shot downs), along with the full specifications, contract etc, good scale rule, and a set of coloured pens / pencils. (Note: Always be weary with scalling directly from drawings - always believe the dimensions)



Have a good read of the contract, specifications and drawings, try to understand what you are trying to build etc.



Work out the sequence that the work will be carried out, if its a steel framed building, start with ground clearance, drainage, foundations, steel work, floors, claddings, outfitting etc etc .



Work out a colour coding for your pens / pencils against the work you will need to identify.



Produce a proforma sheet of paper (or spread sheet), usual headings, item no., description, qty, size, etc etc.



Then "flog" thro the drawings /specs. in your predetermined order. As you "take-off" items/quantities color the drawing item in and make notes etc, then add/update your proforma / Spread sheets. At the end of the job you will need to rationalize similiar types / quatities etc.



Work out a percentage error that you think you may have made, i.e. not a full set of drawings, holds on drawings and add to your quatities, and qualify what you have done.



If the drawings are in CAD format and you have access to the CAD system, then you can use CAD to do a lot of your calculations. (great for really fancy profiles in steel plate etc).



At the end of the job you will not only be an expert on the building but also you will know all the quanties etc.



Their are various bits of computer software you can use to help you - try trawling the webb for details.



Best of luck



John

You can used AutoCADD to get it. Tools...inquiry...distance...area then click to the sides of materials you want to know.

just hire a Q.S.

Just use basic mensuration techniques on drwing

Basically L X B X H=.....Volume



and L X B =....Area



:D





Thats all ...........



Then the rest depends on what kind of quantities you are searching for!

Do u have experience in analizing drws??