the weight capacity is 20 lbs
Yes - the base unscrews from the top.
Burgs: Thank you for your inquiry with HomeDepot.com The Catskill Craftsmen 14 3/4 in. W Lazy Susan is only available on-line. This item can be ordered from the webpage or by calling HomeDepot.com Customer Service at 800-430-3376. We hope this information is helpful, we appreciate your business.
No, that is the only size for this item.