These stand-alone plans will help you design and build a code compliant set of Alternating Tread Stairs. The instructions walk you through the design process and provide super-detailed explanations so you understand why you are building what you’re building. Just be sure that if you need the building inspector to sign off, you check the limitations for when you can use an ATS on Sheet 3 before investing time and money.
 
The pdf file you receive includes four 11 x 17 sheets that need to be printed actual size so they are to scale. If you don’t have easy access to a large format printer, the pdf also has eight letter size pages with instructions on how to precisely join the pages together to make pseudo 11 x 17 sheets.