I have a 2006 sur-trac 5x12 with 2ft steel sides. The size is good but when I put 2 yards of top soil on it yesterday I think it was overloaded. The weight I think was 4000lbs and I have 3500lbs axle. Also I don't know what weight you need trailer breaks at? Can I have a second axle with breakes put on? A dump trailer won't be beneficial because all my jobs seem to be in back yards. I also don't have room or need for 2 trailers. Or should I be looking for a new trailer? Thanks, Sorry I am new to DOT regulation stuff for weight and what not.