A Drive-In System will definitely yield many more pallet positions than a Selective or Double Reach system (approximately 1200 vs. approximately 800 for the selective system, based on a building size of 9630 square feet, four pallets high, 10″ aisles).
However, it again further reduces your pick selectivity and it offers little or no FIFO (First In / First Out) capabilities. A Drive-In / Drive Thru system is an excellent choice if there are no FIFO issues, if you are storing a very limited number of SKUs, and if the pallet and load heights, widths, depths, and weights remain relatively uniform to allow for consistent load rail heights.
For assistance with Drive Thru Racking Systems and a quote, please contact us at 330-788-4081.