Concrete anchors

Concrete anchors are a heavy duty anchor for fixing objects to masonry surfaces. Here we use a thru bolt to demonstrate how to fix a piece of wood to a concrete slab. One problem with thru bolts is that they are extremely difficult to remove and so here we have drilled the hole much deeper so that the old thru bolt can be knocked into the hole.

See Also : บทความวิศวกรรมโยธา Civil Engineering