Jaypro Sports BLDP-2TRG - Manual (Page 5)

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5. Making sure the undercarriage frame is square and plumb, install the seat
and foot planks. The seat and foot planks are best installed starting from
the front seat and working towards the back. Use the hardware and bolt
clip as shown in figure 5. Position planks so they are centered on the
frame, with equal amount of overhang on each end. Note that standard
bleacher (BLCH-2TRG) have a single foot plank, which is centered on the
support frame, see figure 6. Preferred bleacher (BLDP-2TRG) have
double foot planks and are installed as shown in figure 7.
FIGURE: 5
FIGURE: 6
(SINGLE FOOT PLANK)