All, I have a room under a 13'x19' x 6" garage concrete pad. The room is as big as the pad. I have found the load bearing supports directly under the pad itself, and in the crawl space beneath (20 foot LVL plus other strong concreate backed timber). My question is this: There is a header that runs across the far side the room perpendicular to the joists, which separates the room from the toilet/sink and closet. The header is made up of solid 4x12 timber in 3 different lengths: 7 feet, a space of 3 feet, a 3 foot timber, a space of a space of 3, and another 3 foot beam. The beam is supported by king studs inside both exterior walls, . The header runs parallel to the joists, and has a framework build up to "support it" underneath the house, but only in the middle. The king studs in the exterior walls don't have any support going down into the concrete foundation of the house... the "header" runs perpendicular to the roof, too. I want to tear the header out after I install a solid beam the entire length of the room with some dressed up columns about 3 feet in from where the current beam is (60 inches to open up the new bathroom, etc)... I'll support my beam with concrete cylinder footprints (48" tubes buried 38" and then supported inside and out with concrete and steel brackets). I've eliminated anything this solidly build seemingly faux header is needed for... but does it look like I am missing something??? Key points that make me think I can kill it: -Runs with joists -Runs against peak of roof -Beams are solid timber (not stronger LAM or LVL) and cut into sections -King studs do not channel down structure into foundation -Garage pad has a wall under the lip of the pad (most interior side of the house) which seems from my stud detector to have some 4 x8's running down it, which connect to similar timber in the crawlspace and into a concrete foundation. Causes of concern: Seems too darn well built to be meaningless!!! And it's under a concrete pad

Wondering if we should do anything to insulate our crawlspace in some way. Its a cement floor, unconditioned, with a few very small windows (that open) to the outside. The "ceiling" of the crawlspace has the pink batt insulation, but the people before us installed it upside down/reverse. Would it be worthwhile to i) spray foam insulate the walls of the crawlspace, ii) spray foam insulate the "ceiling" of the crawlspace, iii) just have the pink batt insulation installed correctly, iv) put a vapor barrier on the floor, v) a combination of any of these, and/or vi) something I'm not thinking of. If I can only do one or two, what is most cost effective? Thanks for any advice.