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*For smaller units with punched pans, the hat channels are factory positioned under the unit knock-out anchoring holes for field drilling & anchoring. (sizes approx. unit -1″, LxW) **For larger unit with base rails, Qty-2, 2″x2″ 16ga. G90 angles provided loose for field fastening vertically into the hat channels & horizontally into the unit base rail. (sizes approx. L-2″ x W+5″) All mounting/anchorig hardware is BY OTHERS. NOTE: Custom submittal drawings provided for approval prior to ordering, per unit/curb application. Unit factory submittals or hand sketch with bolt pattern must be supplied before submittals can be produced. Custom designed for condensing units or horizontal unit applications.