QUESTION: What is the floor to top of mattress height? Does the top of the mattress clear the rail when the rail is in the down position? ANSWER: The bed is 12" from the floor when it's at the lowest position. Usually a hospital mattress is between 5" and 8" thick depending on the type of mattress you choose. The innerspring mattress that we offer as optional one for this bed is 7" thick. So the total is 23" from the ground. Yes, the top of the mattress clear the rail when the rail is in the down position. If this bed height is not low enough for you, you may consider our Lo-Max bed AZ4804. For more discussions, options and details about the product, or to order the product, please click here This manual Hi-Lo hospital bed represents a true engineering breakthrough, combining long term care needs with acute care features. Shipping is free. This Eze-Lok manual Hi-Lo hospital bed features a single pedal to secure the bed to the floor at any sleep surface height. The color-coded pedals show green for mobile and red for securely-locked. Durable powder-coated epoxy finish. Designed to meet the requirements of applicable HCPCS codes. UL 2601-1 and CAN/CSA C22.2 No. 601-1-M90 approved. Available with different bed lengths. The head and foot boards are available with light oak, medium oak or dark walnut finishes. Innerspring mattresses of different sizes for homecare / nursing home care are sold separately. Warranty: Welded steel bed frame: Limited Lifetime. All other components: Five Years. Electronics: Two Years. Bed Height: 12" - 24" Overall Length: 82", 86" or 90" Sleeping Surface Length: 76", 80" or 84" Overall Width: 37.25" Sleeping Surface Width: 35" Weight Capacity: 400 lbs.