Gutter Pan Slope

There will be minimal grade adjustments necessary where the flatter gutter pan matches the existing street surface approx.

Gutter pan slope. The slope of the gutter must be transitioned from the standard 1 12 slope to a 1 20 slope. See example table 8 8a. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. 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.

The common design treatment for a road is a concrete gutter that is built to match an asphalt lane. When adjusting from 1 12 to 1 20 gutter slope. Second view showing double grade break. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.

Most contractors tend to set the slop at one quarter inch per ten feet of guttering. The concrete gutter is oftentimes at a different slope than the asphalt lane and its surface is rarely flush with the lane. This grade adjustment can be accounted for in the patching that is required when replacing old curb and gutter sections. Let s explore that further.

The lower pan is cleated to the roof deck with the indicated clearances determined by expansion calculations. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. For roof slopes less than 6 on 12 the upper roof pan is attached to a locking strip soldered to the lower pan. Figure x02 4 h counter slope conditions.

Steep counter slopes will cause some wheelchairs to catch on back rollers and lose drive wheel traction.