2 Post Vertical Shore/Laced Post 6’ 2 Post Vertical Shore/Laced Post 4’ Maximum vertical post spacing for this shore is 4’ utilizing 4X4 and 5’ utilizing 6X6 and header and sole O.H is 12”. Minimum spacing is 3’. These requirements should be utilized to determine the length of the header and sole. Evaluate the space where the shore will be placed and engineer accordingly. 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. Lay out the header and measure and mark for vertical post placement. Place the vertical post at that measurement . Insure that marriage between vertical and header are flush and that the joint is square. Place a half gusset over one joint with appropriate header overhang and nail it with 4 – 8d nails in the header and 4 – 8d nails in the vertical. Flip it over and duplicate the process on both vertical post joints. If the overall height of this shore is >6’, a midpoint 2X4 brace is required with 3 - 16d nails in each vertical post. If the overall height of this shore is > 11’, two midpoint 2X4 braces are required. . If the overall height of this shore is > 17’, three midpoint 2X6 braces are required . These braces should be evenly spaced. Place all required midpoint braces on the verticals and nail them in place maintaining spacing between vertical posts. Measure for all 2X4 diagonals other than the bottom diagonal. Cut them and nail them in place utilizing 3 – 16d nails. The bottom diagonal cannot be measured or installed until the shore has been pressurized. This shore can be built in pairs and laced resulting in a Class III laced post shore. Ex. A total void height of 8’ would receive vertical posts = 87 ½ “ (7’ 3 ½”) Application: Utilize this Class II shore as a two post shoring system to support vertical loads or build it in pairs and convert into a Class III laced post shore. Maximum height for this shore is 12’ utilizing 4X4 and 20’ utilizing 6X6. 6X6 shore requires 2X6 bracing. Design Load is: 4X4 posts <8’ = 16,000 lb. 4X4 posts 8’ - 10’ = 10,000 lb. 4X4 posts 10’ – 12’ = 7,000 lb. 6X6 posts <12’ = 40,000 lb. 6X6 posts <14’ = 29,000 lb. 6X6 posts <16’ = 24,000 lb.

2 Post Vertical Shore/Laced Post ½ G X 2 ½ G X 1 2 Post Vertical Shore/Laced Post Scribe out the placement of the vertical posts on the sole plate. Stand up the pre-fabricated top portion of the shore, align the vertical posts with the floor joists if applicable and set it on the wedge packs and sole plate. Lightly pressurize. Insure that the shore is plumb. Finish pressurizing. Capture the sole plate and vertical post joints with half gussets utilizing 4 – 8d nails in the sole plates and vertical posts. One side of the joints will be captured with the half gussets and a 2” x 4” diagonal brace. The interior or other side of the vertical posts and sole joints will both be captured with half gussets. It is important to place the half gussets on the outside edge of the vertical posts as opposed to centered on the vertical posts. This practice will allow this shore to be converted into a laced post shore without limiting access to the outside edges of the verticals. ½ G X 2 ½ G X 1

48” Laced Post Shore Layout sole plates to accommodate prebuilt two post shores. If top half of two posts cannot be pre built then a build in place application will be required. Refer to two post vertical spacing requirements. This spacing should also be applied to the distance between the two post shores. Place both sole plates in desired location with 3’ – 4’ spacing between sole plates, mimicking the spacing set between vertical posts. (5’ allowance for 6”x6”) Measure for placement of vertical posts utilizing 12” O.H. Place 2X4 wedge packs on top of sole plate on the vertical post locations. To help insure both systems stay square, toe nail a 2” x 4” cross brace onto the outside ends of both sole plates and utilize a framing square or “3,4,5” to square up the base. All cross bracing should already be cut to accommodate planned spacing. Ex. Vertical spacing of 4’ would result in 6’ headers and soles and 4’ – 2”x4” cross braces. 48”

Laced Post Shore ½ G X 2 ½ G X 1 ½ G X 2 ½ G X 1 When prefabricating the two post vertical shores for the laced post system, it is a helpful practice to lay both headers together and build out both shores. This will insure mirror images are constructed and bracing and half gusset placement accuracy. Place both verticals into position on the sole plates and follow pressurization procedures. Insure that the spacing between the shores is maintained and square both at the bottom and top of the system. If built correctly, looking through the shore, all diagonal bracing should form X bracing and be located on the outside of the shore. ½ G X 2 ½ G X 1

48” Laced Post Shore Once both shores are pressurized and braced, lace the shores together with additional cross bracing and diagonal bracing. Orientation and angles of bracing should be consistent with what has been established on the two post vertical shores. In this illustration, diagonal bracing has perpendicular cuts. Rescuers may elect to apply 45 degree cuts to the ends of the diagonals to maximize nailing surface and reduce diagonal brace overhangs. Application: Utilize this Class III shore as a four post shoring system to support vertical loads. The laced post shore is extremely strong and versatile and can reach extended heights as well as reinforce existing columns or vertical structures which are compromised. This shore also provides excellent protection for rescuers as a safe haven.

Laced Post Shore 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. < 6’ 6’ – 11’ >11’