NewUrbanStreets

Sharring experiences in urban infrastructure delivery.
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Paver Inserts–New Life for Concrete Sidewalks

January 09, 2010 By: Tom Davis Category: Sidewalk Features

Concrete sidewalks can become an addition to the streetscape rather than just a gray strip that contributes nothing to the experience.Paver panels added to existing sidewalk by sawing in tool joint. Final product appears as if built at same time. Replacing the entire sidewalk is usually not feasible. We tried something new that uses the existing sidewalk as the framework and only replaces a uniform area that can be easily removed and filled to create a classy, customized feature. (more…)

Paver Crosswalks–Loading Considerations

October 30, 2009 By: Tom Davis Category: Sidewalk Features

You need to seriously consider the type of traffic the concrete unit pavers in crosswalks must support.Traffic moves from the left to the right. Note space between pavers is excessive due to shift to the left due to vehicle thrust. Keep in mind that in many urban streeets the right-side curb lane is used by buses and face a much greater range and frequency of heavy loads than do the other lanes. In addition, I believe, the crosswalk on the approach side of the intersection experiences a greater load from the buses–and to some extent cars–because when the signal changes to green the vehicles are accelerating harder as they cross over those pavers than when they cross the paver crosswalk on the other side of the intersection. (more…)

Sidewalk Paver Foundations

March 14, 2009 By: Tom Davis Category: Sidewalk Features, Special Surfaces

Maintenance cost of pavers–concrete unit pavers and clay brick pavers–is directly related to the installation methodology in two ways. First is the support system below the pavers and second is the gaps between the pavers particularly when cutting them to fit around water meters, street light foundations, parking meters, etc.gualpaverinstall1.JPG

In downtown Houston we have installed pavers on cement stabilized sand (c-sand) and on concrete sub-slabs. As you would expect the sub-slab installations present fewer maintenance challenges. A c-sand installation’s value is directly related to the sub-grade preparation as the C-sand will not span soft spots like a concrete slab. Do not let anyone tell you it is only a lower strength concrete as there are many differences that begins with there being no reinforcing steel in c-sand. (more…)