1. Header and Sole should be cut at 48”. Verticals should be measured to reflect total height of void to be shored minus 8 ½”. 8 ½” accounts for the dimension of the header, sole, and 2X4 wedge pack. Cut the vertical 4X4 post at the desired length. This shore utilizes 12” overhangs on the header and sole. This results in 2’ spacing between vertical posts outside edge to outside edge. Place the vertical post at that measurement. Insure that marriage between vertical and header are flush and that the joint is square. Place a 12X24 gusset over the joint with appropriate header overhang and nail it with 14 – 8d nails in the header and 5 – 8d nails in the vertical. Flip it over and duplicate the process. If the overall height of this shore is >4’, a midpoint 24X24 gusset brace is required with 11-8d nails in each vertical post. If the overall height of this shore is > 9’, two midpoint 24X24 gusset braces are required. These gussets should be evenly spaced such that the distance from top or bottom of shore to the nearest midpoint brace is 2’ max. This shore shall be built in pairs. Ex. A total void height of 8’ would receive vertical posts = 87 ½ “ (7’ 3 ½”) Application: Utilize this Class III shore as a high capacity four post shoring system to support vertical loads. Maximum height for this shore is 13’ and the Design Load is: 4X4 = 32,000 lb. 6X6 = 80,000 lb. 24” 2’ x 4’ Plywood Laced Post Shore

2. Place both 48” sole plates in desired location with 4’ spacing between sole plates. Measure for placement of vertical posts utilizing 12” O.H. and 24” spacing. Place 2X4 wedge packs on top of sole plate on the vertical post locations. 24” 48” 2’ x 4’ Plywood Laced Post Shore

3. Stand up the pre-fabricated top half of the shores and set them on the wedge packs and sole plates. Lightly pressurize. Insure that the shores are plumb and maintain 4’ spacing between shores at the top and bottom. Finish pressurizing. Capture the sole plate and vertical post joints with half gussets utilizing 4 – 8d nails in the sole plates and vertical posts. Both sides of the joints must be captured. 2’ x 4’ Plywood Laced Post Shore

4. Once both shores are pressurized, lace the shores together with plywood cross bracing. Top and bottom cross bracing is ¾” x 6” x 4’ plywood utilizing 5 – 8d nails in each vertical. Insure that 4’ spacing has been maintained. 48” 2’ x 4’ Plywood Laced Post Shore

5. Maximum height for this shore is 17’ utilizing 4X4 and 20’ utilizing 6X6. 6X6 shore requires 2X6 bracing. Vertical height less than 6’ does not require a mid point brace. Vertical height greater than 11’ requires two mid point braces. Design Load is: 4X4 posts = 32,000 lb. 6X6 posts = 80,000 lb. 9’