Measure instructions

In order to make the riggers fit perfectly, the following instructions must be followed. Please measure your boat as instructed. Make sure you take measurements for each rowplace you order riggers for.


  • Print these instructions to keep them aside while taking measurements

  • Print the measurement form of the type of boat you order riggers for

  • Follow the steps below - it is important to have all required measurements

Sax angle (fig. 1b)

This can be established simply and accurate by holding a cardboard (or thin three-ply) about 10x20 cm against the board and draw along a lath which lies over both sax boards.
For more details see fig. 5.
Distance between the rigger bolts (fig. 2)

L1 = Foot room
L2 = Seat room (see measurement form)
This is also the distance between the rigger bolts lengthwise.

Measure the distance between the main rigger bolts in vertical direction.
Z2 and Z3measure from the X-line (fig. 2).
Take care that, for skiffs and double-two, Z3 must be measured exactly to X.
Z3 = R - S.
Z1 = distance between the main rigger bolts

Boat Widths (fig. 1b)
Measure the boat widths (B1, B2, B3) for every rigger position.
Take half the boat width.

For Skiff or double-two with a saxboard like figure 2, the breadth of the aft shoulder must be measured also on the X-line. This is only possible by making an auxiliary construction like figure 3.
For more details, see figure fig. 5 and fig. 6.

The top of the sax to the lowest point of the seat (fig. 1)
Height = A1 - A2 Measure A2 is important because everything is defined from the X-line. (Especially important for smaller boats and C-materials)

Position pin to main shoulder (measurement form)
Most boats are constructed in a way that the pin can be in line with the main frame. Than D = 0. The "work" measure D will be established in consultation with the user or coach.It occurs to skiffs that the seat top will strike against the main shoulder. In that case the pin must be constructed more at fore. This means D = + (positive). Or the seat will roll through the shoulder, which makes D = - (negative).

Only for C-material (fig. 4)
C-boats often have a so-called sheer, that means that the sax boards from the middle to the front and to the back go up. If there is taken no account with this, the pins can be standing in an oblique angle. That's why on every shoulder the height will be measured from the top of the sax till the emplacement (these are the horizontal lath along the boat lengthwise).
When the saxboard has a projecting lip, like figure 5, the sax angle can only be measured with a cardboard of which is taken a piece, that makes the cardboard fit.
To establish the breadth of boats constructed like figure 6, you have to measure from intersection X to X.