Durable extension ladders from Grainger can help you reach new heights, adjusting in 12" increments to a wide range of extended lengths. Choose an extension ladder from maximum working lengths ranging from 12' to 47' and load capacities from 225 to 375 lb. Keep in mind that load capacity includes the user's weight plus that of tools and materials. Choose a lightweight aluminum ladder for jobs where electrical current will not be present. Use a nonconductive fiberglass extension ladder when working around electricity. Shop this selection from Grainger to find a wide range of extension ladders for your lofty jobs.