Hello all, only my second post here. Anyway, bought my house with an in ground pool (my main requirement for the house purchase lol) 15X30 4ft with a 9Ft deep end. It has two spots for ladders to be attached one on the deep end and one on the shallow end. Both of these have aluminum mounting inserts and the inserts are only 16" center to center (seems narrow) and 7" from the center of the insert to the pool wall. Most ladders i can find are 19+ inches wide and have a larger space between the pool wall and the mounting holes.. That's about all i know, hoping someone can give me info on my goofy ladders, or maybe they are common and i am goofy... I'm down for input on either.