Laserfiche WebLink
<br /> <br /> :>-. -\0 , ~ <br /> ~' ~ ~- , <br /> ~ . " <br /> . .~. ~~..}. <br />, "- . 'I t..:.:,....,. ..... .. <br /> ~ ~ ':'.' ~ <br /> . ".~, ~ .).- ~ <br /> """"'- <br /> "- \' .,;. <br /> . "' . <br /> " , <br />, I <br /> <br /> <br />Exhibit 28. Corrugated steel culvert with invert perforations. <br /> <br />Although less common than with metal pipe, corrosion can occur in concrete <br />culverts. Metallic corrosion can take place in the reinforcing steel when it <br />is exposed by cracking or spalling, when the concrete cover 1s inadequate or <br />when the concrete is porous enough to allow water to contact the reinforcing <br />steel, as shown in exhibit 29. <br /> <br />39 <br />