\$\$705.00A

######### Section 705.---ROCK

Revised 13 July 2005

*[INCLUDE THE FOLLOWING FOR STONE GUARDWALLS OR MASONRY]{.mark}*

\$\$705.03A

705.03(a). Delete the text and substitute the following:

> Do not use rock with depressions or projections that might weaken it
> or prevent it from being properly embedded.
>
> In the wall face, no stone shall be less than 2 inches in vertical
> dimension, 6 inches [(15 centimeters)]{.mark} in horizontal dimension,
> or 4 inches [(10 centimeters)]{.mark} in depth dimension.
>
> On the top of the wall, no stone shall be less than 4 inches [(10
> centimeters)]{.mark} in least dimension.
>
> Submit stone samples representing every color to be used on the
> project to the CO for approval.

[]{.mark}

*[INCLUDE THE FOLLOWING FOR GRANITE BRIDGE CURB]{.mark}*

\$\$705.06A

705.06 Add the following after 705.06(b):

> **(c) Granite bridge curb.** Granite bridge curb shall consist of
> granite stone curbs conforming to the following:
>
> Top width 5 inches [(125 millimeters)]{.mark}
>
> Bottom width (min., for 2/3 length) 5 inches [(125
> millimeters)]{.mark}
>
> Depth 9 ± 0.25 inches [(225 ± 6 millimeters)]{.mark}
>
> Length 6 feet [(1.8 meters)]{.mark} (except as noted below)
>
> Ten percent of the length of curb installed on the project may consist
> of stones no more than 6 inches [(15 centimeters)]{.mark} shorter than
> the length specified, except as follows:
>
> **(1)** Stones used in making closures may be one‑third shorter than
> specified.
>
> **(2)** On curves with radii greater than 160 feet [(49
> meters)]{.mark}, but less than 492 feet [(150 meters)]{.mark}, stones
> may be from 4 to 6 feet [(1.2 to 1.8 meters)]{.mark} in length.
>
> **(3)** Cut stones set on a radius of 160 feet [(49 meters)]{.mark} or
> less to the required curvature and, except for making closures, the
> following minimum lengths:
>
> [Radius (feet) [(meters)]{.mark}]{.underline} [Minimum Length (feet)
> [(meters)]{.mark}]{.underline}
>
> 49 to 160 [(15 to 49)]{.mark} 6 [(1.8)]{.mark}
>
> 25 to less than 49 [(7.6 to less than 15)]{.mark} 5 [(1.4)]{.mark}
>
> Less than 25 [(7.6)]{.mark} 3 [(0.9)]{.mark}
>
> Cut the ends of all curved stones on radial lines.
>
> Furnish granite curb that is light gray in color, free from seams and
> other structural imperfections or flaws which would impair its
> structural integrity, and of a smooth splitting appearance. Natural
> color variation characteristics of the deposit from which the stone
> curb is obtained will be permitted.
>
> Whenever stone curb is sawed, clean all surfaces that will be exposed
> and remove any iron rust or iron particles by sandblasting or other
> approved method.
>
> Remove saw marks in excess of 0.12 inches [(3 millimeters)]{.mark}.
>
> Supply either type A or type B stone curb, but use only 1 type on the
> project.
>
> **(d) Stone curb, Types A and B.**
>
> **(1) Type A.** This type of curbstone shall be peen hammered or sawed
> to an approximately true plane, having no projections or depressions
> greater than 0.12 inches [(3 millimeters)]{.mark} and have a top
> surface free from kerf. The front and back arris lines shall be
> pitched straight and true and the back surface shall have no
> projection or depression greater than 1.5 inches [(38
> millimeters)]{.mark}.
>
> The front face shall have a batter of approximately 2:12 and shall be
> hammered or sawed, free from drill holes and with no projection
> through the arris or pitch lines for the full depth of the face. The
> front arris shall be ¼-inch [(6-millimeter)]{.mark} bullnose.
>
> **(2) Type B.** This type of curbstone shall be peen hammered or sawed
> to an approximately true plane, having no projections or depressions
> greater than 0.12 inches [(3 millimeters)]{.mark} and have a top
> surface free from kerf. The front and back arris lines shall be
> pitched straight and true and the back surface shall have no
> projection or depression greater than 1.5 inches [(38
> millimeters)]{.mark}.
>
> The front face shall have a batter of approximately 3/4:10 and shall
> be smooth quarry split, free from drill holes and with no projection
> of more than ¾-inch [(19 millimeters)]{.mark}and no depression of more
> than ½ inch [(13 millimeters)]{.mark} measured from the plane of the
> face through the arris or pitch line for a distance down to within 1
> inch [(25 millimeters)]{.mark} of the bottom. For the remaining
> distance there shall be no projection or depression greater than 1
> inch [(25 millimeters)]{.mark} measured in the same manner.
>
> For both types of curb, the ends of all stones shall be square with
> the planes of the top and face so that when the stones are placed end
> to end as closely as possible, no space shall show in the joint at the
> top and face of more than ¼ inch [(6 millimeters)]{.mark} for the full
> width of the top and for the full depth, after which the end may break
> back not over 2 inches [(50 millimeters)]{.mark} from the plane of the
> joint. The arris formed by the intersection of the plane of the joint
> with the planes of the top and exposed faces shall have no variation
> from the plane of the top and exposed faces greater than 0.12 inches
> [(3 millimeters)]{.mark}.