Slide 1

2D/3D Take-offCandy 2D/3D QTOThe objectives of the CCS Quantity Take-Off:

Measure quantities off 2D drawings and 3D BIM modelsIntegrate these quantities into Candy seamlesslyUpdate quantities after drawing revisionsHandle Bill, Final, Actual and Claimed quantitiesProvide quantities for the BOQ, Subcontract bills and Area bills

The Candy Bill

There are two columns in the Candy BOQ to receive quantities measured in the take-off.

QTO Quantity1 is where the measured quantities land when they are brought back into the bill.

QTO Remarks2 records the drawing and object for each quantity.

If there are multiple sub-quantities against a bill item, they are displayed as lists in these columns.

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Copy the Bill to QTO

A copy of the bill is made available for use in the take-off1.

This allows multiple people to be working with the bill at any time off a server or remotely on individual PCs.

When take-off quantities are sent back to the originating bill the supervising user must accept the measurers quantities and copy them from the QTO column to the relevant quantity Bill, Final, Actual or Claimed.

Bill items are uniquely identified so the quantities could be retrieved back by the bill automatically in the future.

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Candy 2D/3D QTO

Starting the QTO

Clicking the QTO icon1 starts up the take-off application.

This is a completely separate program from Candy but the two are linked by the common copy of the bill that was created in the previous slide.1Candy 2D/3D QTO

The QTO documents

The QTO interface is divided into the six panels shown here:

The bill copied from Candy.A list of the drawings used in this take-off.Templates of common measure-ments for re-use .A list of Measurement foldersA list of take-offs.The drawing display area.

The panels can be moved anywhere on the screen, or better still, displayed on multiple monitors.Drawings are displayed here. Each active drawing is identified by a named tab at the top.List of Drawings usedCopy of the billList of take-off templatesTake-offs in each folderMeasurement folders123456Candy 2D/3D QTO

Step 1: Setting up a new QTO

A new QTO is created from the File menu1.

A database is created which holds the copy of the bill, any drawings used including annotations made, all take-off measurements, calculations and the relationships back to the bill.1Candy 2D/3D QTO

Step 1: Setting up a new QTO

You need to specify where the database is to be stored1.

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Step 2: Loading the Bill

Click on the Bill of Quantities tab1 at the base of the document to display the bill document.

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Step 2: Loading the Bill

From the File menu select Import Bill items1.1Candy 2D/3D QTO

Step 2: Loading the Bill

The previously exported bill is now part of this take-off and is used to hold quantities derived from the measurements against bill items.

Note: the bill can be the entire BOQ, a range of pages or selected items from the BOQ, a Subcontract bill or an Area. Candy knows how to collect and update the quantities from any of the above.Candy 2D/3D QTO

Step 3: Measurement folders

Measurement folders1 are used to group like measurements together. Here we have named the first folder Concrete & Formwork2 and in this example we will be taking-off quantities for these two trades.

A Measurement folder can extend over multiple drawings.

Many Measurement folders can be created and they will listed on this tab.

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Step 4: Loading a drawing

Multiple drawings can be associated with a QTO and are listed on this tab1.

From the Right click menu, select Import Drawing2.21Candy 2D/3D QTO

Step 4: Loading a drawing

Browse for the required drawings and Open.Candy 2D/3D QTO

Step 4: Loading a drawing

All drawings used for this take-off will be recorded in this list1.

PDF drawings usually contain hidden vector information and the Candy QTO uses this data for better control and features like snapping to points.

If the PDF contains multiple pages each page is dealt with as a separate drawing.

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Zooming and Scrolling

Here we have zoomed and scrolled to the slab that will be used in this example.Candy 2D/3D QTO

Calibrating

Before any measurement can be done on a drawing, the scale must be calibrated.

Select the Calibrate tool1 to start this process.1Candy 2D/3D QTO

Calibrating

Move the Calibrate tool (and the cross-hairs) to the start of a known dimension1 and click to start the calibration.1Candy 2D/3D QTO

Calibrating

and click on the end point1.1Candy 2D/3D QTO

Calibrating

Enter the length of the known dimension1. The scale of this drawing is now established.1Candy 2D/3D QTO

Measuring tools

The other measuring tools are:Number - for counting Line - for polylinesPolygon - odd shaped areasArc - curved areasEllipse to be added

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Measuring dimensions

Click on the Take-off list tab at the base of the screen1. This list records all the take-offs done in a folder in this case the Concrete & Formwork folder2.1Candy 2D/3D QTO2

Measuring an area

We are now going to measure the 300mm corner slab shown here.

Select the Polygon tool1 (area) to start the area measurement.Candy 2D/3D QTO1

Measuring an area

Click on the start point of the area to be measured1.

Note how the current measurement tool is highlighted while in use2.21Candy 2D/3D QTO

Measuring an area

Keep clicking on each of the boundary points of the area being measured1.

End the area measurement by right clicking on the start point1 (or right click anywhere and the line will connect to the origin).

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Measuring an area

The item measured is displayed in the Take off List with the standard name of the tool used1.

The area measured is shown against the item2 together with the unit of measure of the tool.

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Measuring an area

The name of the measurement item can be changed to identify the item on the drawing1.

The dimensions that are produced by the polygon tool are the area and perimeter as well as the number of clicks (count)2.1Candy 2D/3D QTO2

Measuring an area

The colour used to represent the measurement can be changed by clicking on the colour sample1 and choosing a colour.

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From measurement to quantity

The next step is to use the measured dimensions to create quantities in the bill. We need the bill on the screen so that bill items can be dragged onto the take-off.

Double click on the Bill of Quantities tab at the base of the screen and the bill will float free. Position it at a convenient place much easier when using multiple screens1.1Candy 2D/3D QTO

From measurement to quantity

Select a bill item1 that uses these dimensions to calculate its quantity and drag it onto the take-off item2.21

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From measurement to quantity

Drag the word Area into the formula field of the formwork item1.

This immediately calculates the formula to arrive at the quantity which is displayed against the bill item in the take-off2 and in the bill below3.

This is a very simple formula, but complex calculations can be built as required.

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Updating the BOQ

The quantities developed in the take off can be brought into the Candy BOQ by copying the bill file into the QTO quantity column1.1

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Updating the BOQ

The quantities are updated from the take off copy of the bill and kept in the QTO quantity column of the bill1.

Each quantity from QTO records the drawing that it came from and the name of the take-off item2.

It is up to the supervising QS to accept the quantities and copy them to the appropriate Candy quantity Bill, Final, Actual or Claimed.21

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The volume of concrete

To calculate the concrete volume of the measured area we need to define the slab thickness.

Use the Add variables1 function from the Right click menu to insert a place for local variables.1Candy 2D/3D QTO

The volume of concrete

Enter a Variable called T to define the slab thickness and give it a value of 0.300m1. 1Candy 2D/3D QTO

The volume of concrete

Drag the reinforced concrete item from the bill1 and drop it on the take-off2 this links the bill Item to this measurement on this drawing.

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The volume of concrete

Enter the formula for the concrete in the slab Area x T1. This calculates the volume of concrete and shows the result on the right2 as well as in the bill below3.

When the variable T is dropped in the formula field you are given a choice of operator to place between it and Area nothing, /, *, +, -.123Candy 2D/3D QTO

Another measurement

Another measurement example : a slab named RC Ramp Slab A1 and coloured Yellow1.1Candy 2D/3D QTO

Another measurement

The thickness of slab is entered as a Variable as in the previous example. A new variable, RampArea, is needed to calculate the actual area of the ramp slab on the slope1.

Both the formwork and concrete bill items are associated with this area by dragging them onto the take-off item with appropriate formulae2 to calculate their quantities.21Candy 2D/3D QTO

Fixing a mistake

The ramp slab area was incorrectly demarcated. This is easily fixed by simply dragging the corner points to the correct positions1.

Note how all the quantities that are associated with this measurement are changed immediately 2.212Candy 2D/3D QTO1

Back to the Candy BOQ

The sub-quantities calculated from each of the two slab take-offs are shown against the respective bill items in Candy1.

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Templates

Templates of common measurements can be made to speed up the take-off process.

Templates can be kept in a master (not available yet) or are made in the current job as shown in the following example.

Click on the Templates tab to start1.1Candy 2D/3D QTO

Templates

Right click to make a new template1.1Candy 2D/3D QTO

Templates

Give the new template a generic name and specify which tool it uses Number in this case1.1Candy 2D/3D QTO

Templates

Define the variables the template will need1.

Work in progress: Dummy bill items will be added to the templates so they can hold the quantity calculation as well.1Candy 2D/3D QTO

Templates

From the list of templates, drag the one to be used onto the drawing and proceed as if it were a normal tool.

In this example, Column was dragged onto the drawing and clicked on the three columns indicated1.1Candy 2D/3D QTO

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Templates

From the list of templates, drag the one to be used onto the drawing and proceed as if it were a normal tool.

In this example, Column was dragged onto the drawing and clicked on the three columns indicated1.

Templates

Enter the variables that apply to this instance of the template1.

Then drag the appropriate bill items onto the take-off item as shown previously to calculate the quantities.

In future versions, dummy bill items will be available in templates which would hold the formulae to calculate quantities.1Candy 2D/3D QTO

The Continue tool

If we had left out a column, ticking the continue box1 allows us to click on more columns which would simply increase the count.

The Continue function operates with all the measuring tools.1Candy 2D/3D QTO

BIM Models

If a BIM model is available it can be used to generate quantities in a similar way to 2D. The advantage with a proper 3D model is that it knows a lot about the dimensions of its elements.

Here we are about to import another drawing, 3D this time1.1Candy 2D/3D QTO

BIM Models

Browse for the model in this case its one of the Revit demo models.Candy 2D/3D QTO

BIM Models

This model can be rotated, sliced, walked through, etc.

Here we are using the Autodesk Design Review.

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BIM Models

Here we have selected the external concrete wall11Candy 2D/3D QTO

BIM Models

..and isolate it so we can see it better.Candy 2D/3D QTO

BIM Models

Select this element as a take-off item1..1Candy 2D/3D QTO

BIM Models

.and it appears in the Take-off List with the dimensions that have been published in this model1.1Candy 2D/3D QTO

BIM Models

Proceed as before by dragging the relevant bill items onto the take-off item. Quantities are immediately transferred to the bill below1.1Candy 2D/3D QTO

BIM Models

The quantities from the BIM model behave exactly the same as 2D quantities1.1Candy 2D/3D QTO

Short term Candy IntegrationUpdate quantities from multiple take-off databases.Exchange folder to deal with multiple bill exports.

Short term 2DImport from master take-off.Add or delete polygon grip points. Ellipse tool.Markup setting and defaults Line thickness etc.Custom PDF printing of drawing. Currently only prints to existing printer drivers.Revised Drawings update/redo take-off quantities.

Short term 3D3D templates ?Extract the correct unit from modelRevised model update/redo take-off quantitiesAdding simple mark-up i.e. thickness of wall if it is not quantified.Change visibility of object from take-off list.Extract 3D object namesMatch like 3D objects i.e finds all wall objects and apply same bill items and formulas.

Long term Add and delete bill items.Do we need our own 3D viewer (hoops or similar) ?Analyse 3D objects to calculate additional quantities.Highlight differences between drawings Overlay the drawings. (2D)Read 2D Autodesk dwg files.

2D/3D Take-off- The End -