Looking for some help resolving a friendly disagreement between myself (carpenter) and a friend (electrician). He has an attic that he is finishing into an office and is applying paneling to the underside of the roof rafters (2×6 16″o.c. about 16′ long). He is concerned that this might overtax the rafters and cause them to sag. I contend that they should easily be able to carry this extra weight. Anyone care to plug in an opinion…….