Tire Pressure Advice

The Goodyear GST614RST trailer tires have a max rating of 110psi cold inflation, which I have always kept them inflated.  A friend recently suggested that in hot weather driving I should keep only 105psi to give the tires greater room for expansion due to heat. 

I always thought that even at maximum inflation the tires are designed to handle the additional psi driving on hot roads.....trying to avoid blowouts and appreciate any advice on best psi.  Thanks, Peter