This configuration protects the building from trucks backing in.
Projection length increases proportionately to amount of decline or incline.
If installing restraints, extensions plates must be ordered with the same projection.
Dock lip penetration (purchase) must be considered with projections and
bumper sizes. A minimum of 4-6" lip penetration is required for safe dock operations.
| Percent of Grade= |
RISE (R1) |
| RUN (R2) |
RISE: the
difference in elevation between the dock and a point in front of
the dock.
RUN: the actual distance on the driveway which the rise is measured against
|
| % of Grade |
Laminated Bumper
Projection |
Minimum Pit
Projection |
Total
Projection |
| Level |
4.5" |
0" |
4.5" |
| 1% |
4.5" |
2" |
6.5" |
| 2% |
4.5" |
3" |
7.5" |
| 3% |
4.5" |
4" |
8.5" |
| 4% |
4.5" |
5" |
9.5" |
| 5% |
4.5" |
6" |
10.5" |
| 6% |
4.5" |
7" |
11.5" |
| etc. |
etc. |
etc. |
etc. |
|
Pit projection should be increased a minimum of 1” for every 1%
of grade on a decline approach of 4% of grade or higher.
For declines of 1%-3% of grade, bumper projection may be required
using build out blocks, extensions or thicker bumpers.
Note: If building wall projects past dock face, greater dock bumper projection should be considered.
Dock Design
