Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 70646 Ladder 16 x 2.5 with Three 2 x 2 Studs this part is a alternate of it
• 87913 Ladder Holder 6 x 2, for Ladder 14 x 2.5 Pair of this part