One way to find crib assembly instructions is to check the crib manufacturer's website. Popular crib brands such as Graco, DaVinci Baby and Delta Children offer crib manuals for their products on their respective websites. The website for the Juvenile Products Manufacturer's Association provides links to obtain crib assembly instructions and order replacement hardware.
Most of the crib manuals are available in portable document format, which makes them ideal for printing a copy. If the assembly instructions for your crib aren't available online, call the manufacturer for a copy. Manuals for older and recalled cribs may not be available if the crib is unsafe to use.
If the assembly manual is needed for a secondhand crib, make sure the crib has not been recalled and meets all current safety specifications. Cribs with drop-sides or removable railings were banned in 2011 due to safety issues. Many other modern cribs from name brands have been recalled for safety reasons. BabyCenter.com has a product recall finder that allows you to search for your crib brand and model to make sure it hasn't been recalled. Other factors to consider include the spaces between slats and whether or not the crib has unnecessary decorative elements.