Are Spiral Staircases Legal
Title 24 part 2 section 3305 c.
Are spiral staircases legal. The spiral staircase kits make it very simple for you to put a little elegance in your home. A 5 foot diameter or larger stair will provide this standard stair width. Domestic spiral staircases come under 2 aspects of the building regulations. Landing width shall not be less than the required staircase width.
Although they re fairly common these days you need to be sure that spiral staircases meet the building codes in your area especially if you re going for a custom build on the staircase. The california code of regulations for commercial buildings for example allows spiral staircases to be used as an exit if the minimum tread width is at least 10 inches and if the inner radius of. Regulations cover them and you need to be sure you comply with the rules. The rules within part k don t apply to spiral or helical staircase designs.
You make a grand entry walking down your beautiful all wood spiral staircase which you built using one of the are spiral staircases legal. Spiral or helical staircase regulations. Private stairways serving an occupant load of less than 10 and stairways to unoccupied roofs may be constructed with an 8 inch maximum rise and a 9 inch minimum run. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3 8 inch.
Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide. Bs 5395 part 2 1984 this states that a spiral serving 1 habitable room should have a 600mm clear width max rise of 220mm and centre going of more than 145mm. Stair balusters shall be spaced so a 4 inch object cannot pass between. However they do not suit all applications since spiral staircases are so commonly found in homes with an awkward available shape for stairs or a limited space to install them.
Osha industry guidelines on spiral staircases. Spiral staircase kits that are most often made from cast metals and which slot together are available from a number of manufacturers. The lack of a uniform depth for the. Part k of the building regulations provides the guidelines for ensuring occupants or visitors to a house are protected against falling collision or impact.