Texan & Cow Stop Cattle Guard Forms Make Most sizes, 6′, 12′, 18′, 24′, 30′ Long and as Wide as you like! Simply Lay them End to End! Available For 8 ft., 16 ft., & 24 ft. Openings! Simply Lay Them End To End! Cattle Guard Forms Make Life Simple. The Cattle Guard Form is 8 ft. x 6 ft. Place two side by side for Double Gate Width A single Cattle Guard Form will cover up to 12 ft. openings by using wings on the side of the cattle guard. At only 140 lbs. placing the form is a snap Place the form, pour the concrete into the openings, remove the foam blocks, and you're done!