PRECAST PARKING STRUCTURES

-NOTESlowdepth of the crack. Also, studies have shown that wherecracking is perpendicular to the reinforcement the possibilityof corrosion is greatly diminished. The presence of an appliedpenetrating silane sealer, typical on many deck surfaces, createsa thin hydrophobic protective layer on the surface andprovides additional protection against possible corrosion. Itshould be noted that reapplication is required periodicallyand manufacturer’s recommendations must always be followed.C. Inspect floor expansion and control joints for deterioration,wear, and/or abuse (from snow plows and other cleaningequipment). Repair as required. Expansion joints are particularlysusceptible to snow plow damage. Many expansionjoint manufacturers void their warranties unless the snowplowis lifted over the expansion joint. Even those that allowplowing over the expansion joint require the blade to be perpendicularto the joint only. Each manufacturer has specificrequirements that should be followed.D. Inspect and clean floor drains, repair downspouts, and removebarriers that prevent proper water flow to drains. Cleaningshould include removal of drain grates and cleaning of pipesat bends and joints.E. Elastomeric traffic-bearing membranes should be patchedwhen visual inspection indicates ripping, tearing, bubbling,and/or excessive wear. Discoloration is often an early signthat the membrane is approaching the end of its useful life.Protection over connections should becrack free.-13-2. Annually (Spring)A. Inspect structural connectionsMost structural connections between precast concrete memberswill not require maintenance during the life of the structure. However,the following types of connections should be monitored andperiodically maintained:Recessed ConnectionsIt is common practice for welded connections between membersto be recessed and covered with a cement grout to conceal andprotect the connection plates. If the thermal properties of theprotection layer vary from those of the base concrete, cracks mayform over time at the edges of the recess.Recessed connections may needperiodic maintenance.