IF THIS IS GOING TO BE YOUR ONLY ACCESS TO AN UPSTAIRS, BUY THE UNASSEMBLED FURNITURE/FIXTURES FIRST- ALL WITH A 200 YR GUARANTEE(HA). I BOUGHT MY HOUSE WELL UNDER MARKET IN 1998 BECAUSE NO ONE WANTED A SPIRAL STAIRCASE & MY 3 YR OLD THOUGHT IT WAS A HOOT(FUNNY, BY NOW I THOUGHT I WOULD HAVE REPLACED IT, NO WAY!)....BEST INVESTMENT I EVER MADE....BE REAL CAREFUL /W/ UNDERGROUND VERTICAL SUPPORTS AS MINIMUAL SQ IN SUPPORT 95% OF WEIGHT. GOOD LUCK AND DONT FALL...I HAVE YET TO FIGURE A WAY TO STOP IN MID STREAM -B