I picked up a roll around cart that was being scrapped at work thinking I would make a brazing table out of it.

My idea was to build an edge around the top and put firebrick inside for the surface.

Well firebrick has turned out to be hard to locate. With several uncles that make a living laying brick, I thought this would be easy to find. It seems that they use a metal fire box now days for fireplaces.

What surface would you use for this project?