Construction managers on multi-level building project must deal with active deck access for workers as the building goes up. Ladders and temporary stairs are common solutions; however, ladders can be dangerous and building temporary stairs on the jobsite take valuable time. Prefabricated stair systems, which are pre-fabricated in factories and shipped to jobsites as complete kits, have been developed to alleviate many of the issues surrounding multi-level stair erection. Prefabricated stairs significantly decrease installation time; they also allow the contractor to build a secure stair system earlier in the construction process, which also makes the site safer for workers. Incorporating prefabricated stairs early on during the construction process can allow for the easy safe movement of people through the building during construction and a well-built, engineered stair system in place for the life of the building. This course will provide an overview of modular construction and its growing popularity before moving into a more detailed discussion of prefabricated stairs. A case study will be used to illustrate both the onsite assembly process and the benefits of these systems. The final part of this course will discuss other prefabricated elements, including modular balconies and awnings, which offer similar speed of construction and labor savings as modular stairs.