12.07.2015 Views

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

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Section 552Rub or grind bearing surfaces on piers and abutments to the specified elevationand slope.If the final finished surface is not true and uniform, rub it according to (b)below.(b) Class 2 - rubbed finish. Finish the following surfaces with a class 2,rubbed finish.(1) All surfaces of bridge superstructures, except those surfaces designatedto receive a class 1 or other finish.(2) All surfaces of bridge piers, piles, columns and abutments, and retainingwalls above finished ground and to at least 12 inches below finishedground.(3) All surfaces of open spandrel arch rings, spandrel columns and abutmenttowers.(4) All surfaces of pedestrian undercrossings, except floors and surfacesto be covered with earth.(5) Surfaces above finished ground of culvert headwalls and endwallswhen visible from the traveled way or walkway.(6) Inside surfaces of culvert barrels higher than 4 feet that are visiblefrom the traveled way. Finish for a distance inside the barrel at leastequal to the height of the culvert.(7) All surfaces of railings.Complete a class 1 finish according to (a) above. Saturate the concretesurface with water. Rub the surface with a medium coarse carborundumstone using a small amount of mortar on its face. Use mortar composed ofcement and fine sand mixed in the same proportions as the concrete beingfinished. Continue rubbing until form marks, projections, and irregularitiesare removed and a uniform surface is obtained. Leave the paste producedby this rubbing in place.397

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