If you live in an area that receives excessive snowfall in the winter, you can increase the roof load capacity of your 11' Lifetime storage shed by installing a snow load kit. These reinforcements will increase the snow load capacity of one roof truss to 30 psf. The following are the amount of trusses in each of our 11' Shed models so that you will know how many snow load kits you need for your shed: 11 x 11' Shed has 4 trusses, 11 x 13.5' Shed has 5 trusses, 11 x 18' Shed has 7 trusses, & 11 x 21' Shed has 8 trusses. Note: you will need an electric drill with 5/16 in. Drill bit, & 7/16 in. Wrench for assembly. Hardware included.