BOSTON (WBZ/CNN Newsource/WKRC) - Multiple cars were damaged when a large chunk of concrete fell from the top of a tunnel in an incident that officials said "could have caused some serious damage ...

For large concrete placements using laser-guides screeds ... then use an 8- to 10-foot-wide channel float or check rod. Do not use a 4- to 5-foot bull float. A bull float can smooth the surface ...

This can prove challenging on large pours ... than traditional hand screeding, the float/power screed requires the operator to stand in the poured concrete while screening. The timing of your ...

A small concrete slab doesn’t cost much to ... or darby will suffice for smaller projects, but a bull float is a better option for large slabs. For best results, raise the leading edge of ...