Roof Truss Laser System

System Description
The system consists of 2 or more laser units placed on a line at 6 - 8 meters distance. The units can be installed on a wall, in the roof or on pillars, at least 3 m up to avoid them being touched by mistake. The system is controlled by a PC, which is operated via remote control.

System Function
Drawings are transferred from the design office to the system PC. A drawing is selected at the system PC. Simple commands are used from the remote control to select junctions or plate corners. The laser units mark the coordinates of the selected junction or corner by directing the laser beams to make a cross at the specified point.



The illustration shows projector A and B indicating a junction.

System Advantages

• More efficient production

• Insensitive to height variations. Since coordinates are indicated with crossing  vertical laser lines, the coordinate is correct regardless of height variations from floor to pedestal and timber.

• Robust design with virtually no wear.

• Continuous laser light with no disturbing flicker.

Example of System

A junction is selected with the remote control.
The selected junction is marked by the crossing of the lines. The pedestal is moved
to the cross and locked.
The cross is marked, for example with a magnet.

A plate is selected with the remote control.
One corner of the plate location is indicated by the laser and marked with a marker
pen. The procedure is repeated for another corner of the plate

The plates are placed according to the marks and locked in place for example with
anhesive plastic pieces. The entire procedure is then repeated for each joint in the
truss.

The timber are placed according to the marks, in the image above the marker is a
magnet, and locked in place.

The same method can be used for locating the position of the upper plates.

The first truss is ready for pressing.

Working procedure
One person can do the job alone, probably following the procedure described above.
Two persons can work together.
Person A operates the system, positions pedestals and marks junctions and plate
corners. At the same time person B puts the plates for a batch of trusses in place
next to each pedestal, and then starts the lower placing plates according to the
marks.
The timber can be placed by both persons.
If the system is used to postion the upper plates, person A marks the position of the
plates an puts the plates in place. Person B starts pressing.

Time saved
Compared to manual positioning of junctions and plates significant time can be
saved.
Positioning 10 pedestals and corresponding marks for boards and plates can be
done by one person in 5-6 minutes.