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Precast concrete panels and a ramp were installed on a steel support frame in a conventional 2.6 x 4.9-m slotted-floor pen to produce a free-access two-level pen for growing-finishing pigs. The area of the two-level pen was about 1.7 times that of the single level pen at an added material cost of approximately $70 per m2of upper level. Daily gain, feed conversion efficiency and carcass grade index of pigs reared from 25 kg to market weight in the two-level pen compared favorably with pigs reared in a one-level pen of similar total floor area.
design, cost and performance of a free-access, two-level pen for growing-finishing pigs
Phillips, P.A. and D. Fraser 1987. DESIGN, COST AND PERFORMANCE OF A FREE-ACCESS, TWO-LEVEL PEN FOR GROWING-FINISHING PIGS. Canadian Agricultural Engineering 29(2):193-196.
193 - 196