These are of the common type. They are used to reach most areas to be painted on exteriors of buildings. Practically all surfaces on one and one and one-half story bungalows and cottages are reached with these ladders without using a swing stage. Also they are often adequate for two-story houses. Of course, one can work faster from planks or platforms on large surfaces; so time is saved by not using long ladders often, even where they reach easily. These are made of sound Norway pine, as a rule, with turned hickory rungs mortised into the side rails and nailed there. Lengths are: 8, 10, 12, 14, 16, 18 and 20 feet.
International Association of Master House Painters and Decorators of the United States and Canada Painting and Decorating, Working Methods29