Big Dig managers guilty of fraud over substandard concrete

Accidents happens when a construction firm or the persons involved use substandard materials for their construction project not realizing the grave consequences that tail along with it. One of their so-called reasons is they look for an alernative and cheaper materials and methodology as a solution. There is no problem with it as long the application is not critical. But for critical applications, they should have followed the standards and codes.

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The nuts and bolts of screws

The Do It Yourself method. No one likes to hear that they have a screw loose, so let's look at some ways to tighten them up. Here are some methods on how to fix a loose screw right at the comfort of your own home.

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how to install expansion bolts

there are 2 types of anchors namely: mechanical anchors & chemical anchors. since our topic is how to install an expansion bolt, then let's dwell on the mechanical side.

instructions:

1. drill a hole into the concrete using a hammer drill. do not use impact drill or steel drill because it will take a while before you can make a hole. also, you have to exert extra strength and effort to push the drill. by the way, the drillbit should be the same diameter as the bolt.

2. clean the hole using steel brush and blow-out pump.

3. install the anchor and slightly hammer it with a hammer so it will fit in all the way.

4. tighten it.