Combination extension and step ladder rungs therefor

In a ladder having a first pair of side rails slidably mounted in telescopic relation within a second pair of side rails, a plurality of improved ladder rungs, each rung comprising:

• a first tubular bar joined at the ends thereof to the side rails of said slidably mounted first side rail pair;
• at least two flat stepping surfaces each of which is integrally joined at one end to said bar by a bracket formed between said bar and the flat stepping surface joined thereto, each said stepping surface being supported at the other end by a rod extending from the side rails of said first side rail pair through a bend formed in the end of said stepping surface, said stepping surfaces being essentially symmetrically angularly disposed between said first side rail pair such that at least one of said stepping surfaces will be essentially horizontally oriented whenever the ladder is placed in an upright position;
• and
• a second tubular bar joined at the ends thereof to the side rails of said second side rail pair, the upper and lower surfaces of said second bar being configurated to form flat stepping surfaces that are essentially coplanar with the stepping surfaces joined to said first bar, said second bar being mounted to the second side rail pair so as to permit telescopic extension of the first side rail pair.