Loft ladder generally come in two versions: either aluminum or wood. But although personal preference will dictate which will be right for you and the situation you are in, they are both mounted and attached the same way. As a result, you can use these directions to suit all types of loft ladder to almost all the loft. Set your ladder so you can attach the brackets. With each loft ladder is a pair of brackets to fit. Put your ladder below the actual attic and climb up to the level of attachment points.
Mark the exact point of attachment. The brackets must be attached to the actual roof joists of the attic because they will be the most stable, and they will have adjustments to go with loft ladder to them no matter how wide your joists. Measure the slab from the ceiling down to exactly where you want your loft ladder to attach. You need this precise measure of the second rule also. Mark them with your pencil.
Use your drill gun and self-tapping screws to attach the first bracket on the roof beam to the exact measurement. Do the same to the next bracket on the second rule. Attach the ladder to the brackets. Fold your attic ladder and take it up to the brackets. With the included pins, take the end of the loft ladder and attach it to the consoles loft ladder. It will be a wing nut on the brackets to adjust for the width, and you can adjust this as a ladder standing next to you for a perfect fit.