Hi Martin;
Well Black Locust would certainly be hard
enough.
Might even be too hard? I'm not sure what the preferred decking
wood is on equipment trailers?
Could be the softer Douglas fir is desired?
Might depend if your hauling rubber tire or tracked equipment.
Personally I want your locust as
firewood... Of
course oak would due in a pinch...
Around here we burn Douglas fir and Larch, good wood but not in the same
class as locust!
If you have the wood, it sure will be a pretty trailer deck!