The HDB lift door opening is the real limit at roughly 90cm wide by 209cm tall. Standard HDB doors measure about 91.5x213cm but the corridor turn often blocks larger frames. Leave a 2–5cm buffer when measuring for internal doorway access to avoid getting stuck. Delivery teams won't move it if the dimensions don't fit.
Single beds measuring 91x190cm suit most HDB bedrooms while Super Single sizes at 107x190cm need extra floor space. Parents can't leave less than 60cm clearance on the exit side for safe movement around the frame. Standard lengths of 190cm fit typical BTO room heights without modification. Choosing the right width ensures the mattress sits properly without crowding the room.
Singapore humidity typically sits around 80%+ so untreated wood can warp without proper ventilation. Solid-wood or plywood frames outlast particleboard in damp conditions common to tropical flats. Rubberwood serves as a common affordable hardwood option that resists moisture better than cheaper composites. Regular wiping ensures mould won't grow on any surface exposed to the humid air.