However, there are some instances when an uplift classified as “Urgent” would be spray painted differently. Some examples of urgent uplifts that would be sprayed differently are: pavers or planters in BIA’s, are sprayed on the lower slab; pavers or stamped concrete in a resident’s driveway would not be sprayed. In this instance the sidewalk leading up to the driveway would be sprayed. The reason why these types of items would be painted differently is because not only do they serve as the structural component of the sidewalk but they are also meant to add an increased level of aesthetics to the area.

If you come across a driveway that has settled and is either pavers or coloured concrete then this should be noted on the inspection as these will be reassigned to Public Works Admin Inspectors by Technical Support-IMS.

• 4.6 Uplifting at a Crack

  Over time, due to our climate, the sidewalk may begin to displace or heave at a crack causing a trip hazard (uplift). The most likely reasons this may occur is water infiltration in the crack followed by a freeze thaw cycle and/or extreme heat conditions. Refer to section 5 for other potential causes. If this situation is encountered during an inspection, this will not be recorded as a crack, but will be recorded simply as an Uplift and the “C” will be checked on the inspection sheet. (Refer to Section 4.5 Uplifts for uplift classifications).

Fig. 4.6: Displaced Panels at a Crack  ( www.nachi.org )

• 4.7 Drainage

  Drainage problems cause water to sit on the surface of the sidewalk, which can cause structural damage. They may occur due to uneven settlement beneath the slab resulting in sagging of the panel. Another cause is any combination of the abovementioned deficiencies. Where cracks are present, water (and salt) is able to seep down to the sub grade causing further problems. Drainage problems are sometimes difficult to spot. After a period of rain however, they can be noted as areas where puddles have formed on the sidewalk. (See Figure 4.7)

  Another drainage deficiency could be the tilt of the panel. Sidewalks are designed to force water towards the street. If the panel is graded in such a way that water drains towards the building instead of the street, then the homeowner’s land may be damaged.