INSTALLATION INSTRUCTIONS
SP56-137 STANDARD PLATFORM LADDER
STEP 3:
The exterior skin of a 5th wheel is commonly held in place with weather stripping and screw strips
that are located at the front near the pin box and along the sides of the unit. If the pin box has a cover or shroud,
remove the cover (see Fig. 4). Remove any weather stripping to expose the screw strips and remove the screws
(see Fig. 5- Fig. 10). Pull back the screw strips, allowing the skin of the 5th wheel to sag down a bit so that the
structure inside is visible (see Fig. 11). Please locate the main upper deck tube.
Measure the distance between the mounting points and ensure that the points will match up with a set of pre-existing
holes on the ladder frame mount. If the measurements do not match up, either adjust your mounting location slightly
or add mounting holes in the frame (see Fig. 12 and 13).
It is important that the ladder frame mount is installed on a level surface of the skin of the 5th wheel. It should
not interfere with the curvature of the 5th wheel. Measure to ensure that the first mounting location is beyond the
curve of the unit (see Fig. 14 - Fig. 15).
In some circumstances, the main upperdeck tube is covered up by a steel plate, making it difficult to determine the
exact location of the tube. The plate is also covering up a smaller support tube. This tube can be felt by reaching
around the plate. Measure the width of one of the visible support tubes (the tube covered by the steel plate will be
the same width). Measure over this distance on the cover plate to determine where the edge of the structural frame
member begins. The same process may need to be repeated on the other side of the 5th wheel to determine the
location of the structural frame member there.
Fig. 12
Fig. 14
Fig. 15
3
Fig. 4
Fig. 7
Fig. 8
Fig. 10
Fig. 11
Fig. 9
Fig. 5
Fig. 6
Fig. 13
Fig. 12
