Using reclaimed barn wood on ceiling in a room 11.5 x 15.6 with 2x6 rafters 16" on center. Barn wood is all 1" x 6',5',4' but some are heavier than others. Will that span n spacing carry the loads of the bardwood? I tore down the sheet rock, replaced insulation with new 8" with a bubble double foiled sided vapor barrier. Stopped there, and thought I'd better find out about the live load before I add this weight. so will it hold?