The Precision Point System

Designed by a Contractor for Contractors

Below, you'll find a description of how and why Precision Point works. It shows how you can save up to 75% of your time on layout .

Below that, you'll see a sample Precision Point control disc that was prepared using AutoCAD and our software add-ons.
The Precision Point control disc can also be prepared manually.

You can watch a complete demonstration of the Precision Point manual disc application on YouTube.

The demonstration is comprised of two videos.  Watch Video 1 of 2 (disc preparation back at the shop) or  Watch Video 2 of 2 (On the job)


How and Why Precision Point Works

The Traditional System

1. Most construction layout work is accomplished using a set of control lines physically marked at the site. All trades should take their measurements and locate their target points from these control lines.

2. To locate one specific target point, distances are measured and lines are marked parallel to the control lines. The intersection of these parallel lines indicates the specific target point.

3. To mark a parallel line from the control line requires two measurements or "Tape Pulls" from the control line. To mark the other parallel line requires two measurements or "Tape Pulls" from the other control line. To locate any single target point on the deck surface requires four "Tape Pulls" from the corresponding control lines to find the intersecting point.

4. The number of target locations multiplied by the requisite number of "Tape Pulls" yields the scope of the layout work for a given project deck. To mark 10 target locations will require 40 "Tape Pulls." To mark 100 target locations will require 400 "Tape Pulls". In this example, there are 8 target locations, which requires 32 "Tape Pulls".

Using the Traditional System for Layout, the number of "Tape Pulls" is:
Number of Target Locations X 4
Number of Target Locations
Number of "Tape Pulls"
5
20
10
40
50
200
100
400
One major disadvantage of this traditional approach is that, if control lines are subsequently modified,
the measurements for each target location also change, resulting in major re-work for the layout.

 

The Precision Point System

The Precision Point System is based on grouping the penetrations on each floor into natural groups (like the example at right). A convenient, centrally located Precision Point is identified for each group (the red cross in the example at right) and the other penetrations are measured relative to that Precision Point.

1. Marking the Precision Point. The Precision Point System works from a single control point on the deck surface. This single control point (Precision Point) is marked using the traditional method of target location. To mark the project deck, Precisian Point will require four "tape pulls."

2. Fixing the Precision Point disc. With the Precision Point marked, the Precision Point Control disc (see picture at right) is fixed to the concrete (or wooden) deck using the Precision Point Pin (supplied). The Pin holds the Precision Point disc on center. The disc is then rotated to line up with the directional marks and anchored with a special pin or a roofing nail. If you are not using laser lineage, you can hook a chalk box to the Precision Point Pin and snap the lines for each target. A special measuring tape adapter (supplied) is then hooked to the Precision Point Pin to hold the endpoint for all measurements taken from the single Precision Point along the target lines.


Tape Pulls using Precision Point System

3. Each target is located by taking a single distance measurement along a specific angle marked on the Precision Point Control Disc. The angle is calculated from the blueprint and marked on the Precision Point Control Disc.

The angles and distances for multiple targets are marked on one Control disc - together with additional notes (see large photo of Control disc, at bottom of page). To mark the eight target locations as in the example shown above (and at left) , you would need 11 "Tape Pulls" (four to locate the Precision Point and 7 to mark the remaining Target locations).

This compares to the 32 "Tape Pulls" shown at right, using the traditional system.


Tape Pulls using Traditional System

Precision Point System,
number of "Tape Pulls" =

No. Target Locations + 4

VS

Traditional System,
number of "Tape Pulls" =

No. Target Locations x 4

Traditional System
Precision Point System
Number of Target Locations
Number of "Tape Pulls" Traditional
"Tape Pulls" to
Mark Precision Point
"Tape Pulls" to
Mark Targets
Total Number of "Tape Pulls"
5
20
4
5 9
10
40
4
10 14
50
200
4
50 54
100
400
4
100 104

 

A Dramatic Time Reduction: "Endpoints"

The Traditional System uses "tape pulls" which always require two distinct "endpoints" with two people required to hold the measuring tape: one at each "endpoint". Each target requires four "tape pulls," meaning eight distinct endpoints, using two people to hold the measuring tape.

The Precision Point System uses one common endpoint for all tape pulls, dramatically reducing the number of endpoints. Using the tape adapter hooked to the Precision Point Pin, measuring and marking can be accomplished with one person, if necessary. The time savings for layout is derived from the reduction in endpoints for each "tape pull."


Traditional
Precision Point
Number of Target Locations
Tape Pulls To Mark Targets
Number of Endpoints
Tape Pulls To Mark Precision Point
Tape Pulls To Mark Targets
Number of Endpoints
5
20
40
4
5
5+8=13
10
40
80
4
10
10+8=18
50
200
400
4
50
50+8=58
100
400
800
4
100
100+8=108

With 100 target locations, the number of endpoints is reduced from 800 to 108.
That is where the real time savings occurs. We have demonstrated overall layout time savings up to 75%.
We help you "Stay Ahead of the Steel".

Furthermore, if control lines change after the fact, this only results in two measurement changes to relocate the Precision Point.
This compares to two measurement changes per target location when using a traditional approach.

 

Advantages of Precision Point
  1. Demonstrated layout timesaving up to 75% .
  2. Time savings allow layout process to stay ahead of other trades.
  3. Each manual measurement eliminated is one less opportunity for human error.

 

Sample Precision Point Control Disc

Here is a larger example of a Precision Point Control Disc. This disc was prepared using Precision Point's proprietary process using AutoCAD. The Precision Point process allows you develop the sleeve layout and dimensions directly within the CAD drawing and prepares a file for printing the disc.
(See how easy this is by clicking here)

The example to the right illustrates the information available to manage the layout and installation of the inserts, penetrations or core hole locations surrounding the Precision Point. This includes compass direction, system identification, conventional four point conformation and an inventory.

One major advantage of this approach is that any change to the control lines results in only two measurement changes per Precision Point Disc - not two changes per target location.

The Precision Point Control Disc can also be prepared manually, from templates of the layouts produced back in your shop, fab table or on the job. Here is a link to a video showing this process:
Watch Video 1 of 2

And here is a link to a video showing the process of layout on the job:
Watch Video 2 of 2