Sellwood Attic Ladder Opening Size: 835 x 650mm SKU: 167714 MODEL: Q24 Error. try again later You've successfully joined the club $ 849 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants This timber Q24 attic ladder is designed to fit between trusses at 900mm centres for ceiling heights 2250 to 2440mm. They are most often used to access storage space in the attic. Features and benefits Fits between trusses at 900mm centres. Most commonly in hallways of homes built in since 1980.