box inside of box?

[txpolevaulter_k25]

We just finished pouring our new runway and putting the box in it, and I was wondering if you are suppose to put another box inside of the one cemented in the ground. The one that we have now is all nasty looking, and i had to scrape a ton of left over cement out of it, and the origional aluminum look is now white and rough feeling. Just wondering, because I have seen some runways with an extra 'floating" box inside of it, and some that don't have it at all.

[baggettpv]

You are supposed to clean the wet concrete off the metal box while it's still wet. Then paint it Yellow for good visibility hehehe. When I do this work I hang the box at the proper grade then pour a wet cement around it. Vibrating the concrete making sure to fill any voids around it. On the final screeding I make sure the concrete is smooth to the top edge of the metal box. Thus no lip at all. Any other people with construction questions just email me and I can help. Rick Baggett, Building Trades teacher, Sabin Skills Center.

[rainbowgirl28]

We just finished pouring our new runway and putting the box in it, and I was wondering if you are suppose to put another box inside of the one cemented in the ground. The one that we have now is all nasty looking, and i had to scrape a ton of left over cement out of it, and the origional aluminum look is now white and rough feeling. Just wondering, because I have seen some runways with an extra 'floating" box inside of it, and some that don't have it at all.

A "floating" box sounds like a recipe for disaster when it rains.

[birdi_gurlie]

At a high school in our area, one of the schools' box is a little loose...one of the other coaches said that during the Relay for Life [it was held there] she sneaked in and put quick-setting concrete in to keep the box in place...and they found out and took the box out! Its still a little loose, but not as bad. Its still kinda crazy that she fixed their box and they broke it again ON PURPOSE.