Gutter Pan Slope

Gutter counter slope is the angle point or grade change where the down slope of the curb ramp meets the up cross slope of the gutter.

Gutter pan slope.

Most contractors tend to set the slop at one quarter inch per ten feet of guttering. When adjusting from 1 12 to 1 20 gutter slope. See example table 8 8a. There will be minimal grade adjustments necessary where the flatter gutter pan matches the existing street surface approx.

So what s the ideal amount of slope for your gutters. So if you have a 25 foot section of guttering you should set the downspout end of the gutter 5 8 of an inch lower 1 4 x 2 5 5 8 than the other end. Steep counter slopes will cause some wheelchairs to catch on back rollers and lose drive wheel traction. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.

For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Let s explore that further. The lower pan is cleated to the roof deck with the indicated clearances determined by expansion calculations. Figure x02 4 h counter slope conditions.

This grade adjustment can be accounted for in the patching that is required when replacing old curb and gutter sections. For roof slopes less than 6 on 12 the upper roof pan is attached to a locking strip soldered to the lower pan. The concrete gutter is oftentimes at a different slope than the asphalt lane and its surface is rarely flush with the lane. Second view showing double grade break.

The common design treatment for a road is a concrete gutter that is built to match an asphalt lane.