Monitor Manual

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3 Installing the Monitor

3.3.3 Diagonal Tubes

Sometimes diagonal tubes are included in order to get the necessary stiffness in the installation, especially when the regular tubes are very long. Boats with outboard rudder or severe rake on the transom are typical boats that need diagonal tubes.

When it is impossible to follow the standard rule for the lower tubes (10–15 degrees out and 10–15 degrees down), we also use diagonal tubes, which will make the installation very rigid. The diagonal tubes are always on the same side. Do not attempt to cross them from starboard to port and vice versa. The diagonal tubes are attached to existing bolts and no extra drilling should be necessary. They can start at the bottom of the legs on the MONITOR and go to the upper tube mounting bracket but they can also start at the main frame and go down to the lower tube bracket. We normally select the method with the shortest distance. Placement of the diagonal tubes will be specified on the installation drawing for the specific boat. Also see 2.6.

On boats with open transom, the diagonal tubes often form a "V" with the open end of the "V" attached to the bolts that connect the upper mounting tubes to the main frame. The tubes are then attached to a single bracket at the bottom.

Next >> 3.4 Non-standard Frame Attachments