Loading...
PowerBrace-Supplemental-Installation-GuidelinesPOWERBRACE™ SUPPLEMENTAL INSTALLATION GUIDELINES Ch APTER 1 Lever Bracket Blocking Guidelines Ch APTER 1 Lever Bracket Blocking Guidelines © 2023 Supportworks® All Rights Reserved 4 Chapter 1 Lever Bracket Blocking Guidelines Chapter 1: Lever Bracket Blocking Guidelines Figure 1.1 Standard lever bracket installation Summary The installation of the PowerBrace lever bracket system with joists parallel to the wall utilizes full-depth sawn lumber blocking to distribute the forces from the lever bracket to the subfloor above. It is common to encounter obstructions within the floor system such as electrical conduit, ductwork, plumbing, or other utilities. The installation of the full-depth blocking may be modified within these guidelines to account for such obstructions. Standard Blocking Guidelines • (30) - #10 x 2-inch wood screws are required at a minimum to fasten the steel runner to the underside of the joists and full-depth blocking. The first rule of thumb for blocking is, “if you can see wood through the hole, screw it.” • The 2x sawn lumber blocking needs to be the full depth of the floor joists and it needs to fit in the joist cavity as tight as possible. • The full-depth vertical blocking must be bonded to the subfloor and the adjacent joists with construction adhesive. • The blocking must be nailed or screwed to the adjacent floor joists. • The first joist cavity must be double blocked to provide support for the lever bracket. The remaining vertical blocking should alternate from one edge of the steel runner to the other. Figures 1.1 and 1.2 show a standard installation. Figure 1.2 Standard blocking arrangement © 2023 Supportworks® All Rights Reserved 5 Chapter 1 Lever Bracket Blocking Guidelines Alternate Blocking Guidelines • If there is an obstruction in one joist cavity, a block may be laid flat (horizontally) but cannot be omitted. o One horizontal block may be used without any other modification to the system, as shown in Figures 1.3, 1.4, and 1.5. Secure to joists with 4 nails or screws per side. –Horizontal blocks only require (1) wood screw per pair of holes through the steel runner. Figure 1.3 Alternate blocking arrangement with (1) horizontal block Figure 1.4 Alternate blocking arrangement with (1) horizontal block Figure 1.5 Alternate blocking arrangement with (1) horizontal block © 2023 Supportworks® All Rights Reserved 6 Chapter 1 Lever Bracket Blocking Guidelines o A maximum of 2 horizontal blocks may be used but this will require an additional joist cavity to be double blocked. –A total of 5 vertical blocks must be utilized if (2) horizontal blocks are used. –The 5th vertical block should be added at the end of the system (Figures 1.6, 1.7, and 1.8). Figure 1.6 Alternate blocking arrangement with (2) horizontal blocks Figure 1.7 Alternate blocking arrangement with (2) horizontal blocks Figure 1.8 Alternate blocking arrangement with (2) horizontal blocks The second rule of thumb for blocking is “You can lay one flat (horizontally) with no modification. If you need to lay two flat you need to add an extra vertical block.” Ch APTER 2 Lever Bracket Adjustments for Obstructions © 2023 Supportworks® All Rights Reserved 8 Chapter 1 Lever Bracket Adjustments for Obstructions Chapter 2 Lever Bracket Adjustments for Obstructions Chapter 2: Lever Bracket Adjustments for Obstructions Summary The installation of the PowerBrace lever bracket system can be modified within these guidelines to account for obstructions or atypical conditions. Lever Bracket Pass-Through Notch Figure 2.1 The lever bracket features a notch in the side plates to allow a pass- through window to be built into the installed blocking (Figure 2.1). The notch is in the shape of a square that measures 1.0 inch. Its location on the bracket most often lines up with the bottom wall-side corner of the installed double 2x lumber blocking. It can be utilized by cutting an equal size notch out of the double 2x lumber blocking prior to mounting the lever bracket. Lever Bracket Vertical Adjustment Figure 2.2 The standard installation of the lever bracket will place the bent plate of the bracket firmly against the bottom edge of the double 2x lumber blocking that the bracket is mounted to. In circumstances where some small obstructions exist that interfere with the system components or interfere with the tightening of the system, it can be advantageous to lower the bracket to work around such obstructions. In such cases, the bracket may be lowered as much as 1.0 inch below the standard installation height (Figure 2.2). Note: The notch in the bracket that is typically used as a pass-through window for wires and small obstructions is 1.0 inch tall. Therefore, the bracket may be lowered to where the top of the notch matches the bottom edge of the blocking (Figure 2.2). © 2023 Supportworks® All Rights Reserved 9 Chapter 1 Lever Bracket Adjustments for Obstructions Chapter 2 Lever Bracket Adjustments for Obstructions Lever Bracket Horizontal Adjustment Figure 2.3 Even though 2x lumber joists are most commonly spaced at 16 inches on center, the first joist space next to the rim board will vary. In a standard installation, the lever bracket is placed against the joist on the wall side edge of the second joist cavity. If the first joist cavity is quite narrow, the bracket may need to be placed away from the edge of the joist to make enough room for the PowerBrace beam and the clip that connects the tightening bolt to the beam. The bracket may also need to be placed away from the edge of the joist to work around obstructions (Figure 2.3). Lever Bracket Relocation to the First Joist Cavity Figure 2.4 If there are significant obstructions that exist in the second joist cavity that prevent the installation of the required double 2x lumber blocking, then it may be desirable to locate the lever bracket in the first joist cavity next to the rim board. This is permitted but, in most circumstances, the first cavity is not wide enough to position the bracket a sufficient distance from the wall to leave room for the beam. © 2023 Supportworks® All Rights Reserved 10 Chapter 1 Lever Bracket Adjustments for Obstructions Chapter 2 Lever Bracket Adjustments for Obstructions A minimum horizontal distance of 12 inches is required between the face of the wall and the edge of the joist to install the lever bracket in the first joist cavity. However, in many circumstances, even more room will be required since the deflected shape of the wall will contribute to the determination of this minimum required distance. With the PowerBrace beam or some other straight object placed firmly against the bottom of the deflected wall, measure the gap between the wall and the beam at the top of the wall. This measured distance should be added to the 12-inch minimum distance described previously (Figures 2.5 and 2.6). Figure 2.5 Figure 2.6 © 2023 Supportworks® All Rights Reserved 11 Chapter 2 Lever Bracket Adjustments for Obstructions Another available option would be to flip the direction of the lever bracket, which will reduce the minimum distance down to 8 inches, plus the width of the measured gap. To do this, however, will require some modifications to the lever bracket. The welded nut will need to be removed and placed on the opposite side of the plate. A band saw or angle grinder will be necessary to achieve this. Installation of the double 2x lumber blocking will also be more difficult in this scenario since the cavity will be much narrower and less accessible (Figures 2.7 and 2.8). Figure 2.7 Figure 2.8 Ch APTER 3 Lever Bracket – Joists Perpendicular to Wall © 2023 Supportworks® All Rights Reserved 14 Chapter 3 Lever Bracket – Joists Perpendicular to Wall CHAPTER 3: Lever Bracket — Joists Perpendicular to Wall Figure 3.1 Summary Lever brackets are more commonly used when floor joists are parallel to the wall to be stabilized, but they are also sometimes used when the floor joists are perpendicular to the wall to be stabilized. This set of guidelines may be used in this circumstance. This procedure is only intended for use with standard sawn lumber floor joists 2x8 and greater in depth. See Figures 3.1 and 3.2 for a general view of this type of installation. Figure 3.2 © 2023 Supportworks® All Rights Reserved 15 Chapter 3 Lever Bracket – Joists Perpendicular to Wall Installation 1. Cut the PowerBrace beam to a length that locates the top of the beam (at final assembly) roughly 0.25 inch below the underside of the joist that the bracket will be mounted to (Figure 3.3). Figure 3.3 2. Cut a piece of 2x sawn lumber that matches the floor joist depth to a length of at least 5 feet 6 inches. This piece will be “sistered” to the existing floor joist. 3. With the PowerBrace beam placed firmly against the bottom of the deflected wall. Scribe a line on the underside of the joist that marks the edge of the beam (Figure 3.4). a. Scribe a second line 1.0 inch from the initial mark to locate the front edge of the sister joist. b. Scribe a third line 8.5 inches from the initial mark to locate the back edge of the lever bracket. Figure 3.4 © 2023 Supportworks® All Rights Reserved 16 Chapter 3 Lever Bracket – Joists Perpendicular to Wall 4. Notch out the sister joist as needed to avoid utilities and obstructions in the existing joist. If the joist bridging (also called X-bracing) interferes with the sister joist, the bridging should be trimmed as needed and re-fastened to the sister. 5. Liberally apply construction adhesive to the top and side of the sistered joist where it contacts the subfloor and existing joist, respectively. 6. Place the sistered joist up against the existing joist and push it sung against the subfloor. Secure it to the existing joist with (12) #8 or #10 x 2-1/2" screws evenly spaced into two rows (Figure 3.5). Figure 3.5 7. Install the lever bracket at the previously marked location (Figure 3.4). a. The nailer hole in the lever bracket may be used at the installer’s option to hold the bracket in place while drilling through the joist and sistered joist. b. If installing the lever bracket on a 2x8 joist, the bracket must have 1.75 inches clear from the subfloor to ensure sufficient hole edge distance (Figure 3.6). Figure 3.6 8. Complete the installation of the remaining PowerBrace components (steel runner, lower bracket, tightening bolt, etc.) per standard installation procedures (Figures 3.1 and 3.2). Ch APTER 4 Alternate Bridge Bracket Installation © 2023 Supportworks® All Rights Reserved 18 Chapter 4 Alternate Bridge Bracket Installation CHAPTER 4: Alternate Bridge Bracket Installation Figure 4.1 Summary A typical PowerBrace installation with joists perpendicular to the foundation wall includes the use of the standard steel bridge bracket which has a length that adjusts between 13.5 and 16.5 inches. This bracket can then accommodate for the variation that can be found between 2x lumber joists that have a nominal center-to-center spacing of 16 inches. Although a nominal 16-inch spacing is most common, joists can sometimes be found spaced at 12 or 24 inches, or even something in between. This process for installing the alternate wood bridge bracket utilizes 2x8 or 2x10 lumber that is cut to fit the measured distance between the joists. It therefore provides the required flexibility to accommodate these situations (Figure 4.1). Installation 1. At the locations where the bracket’s saddle supports will attach, use a clamp or some other means to temporarily hold the saddle supports in place. The small nail hole in the center may also be used for this purpose. The orientation of the saddle supports should have the open ends of the slots pointed toward the wall to be supported by the PowerBrace system. Opposing saddle supports should be carefully measured and installed to mirror the other in both horizontal and vertical location on the joists. 2. Using the saddle support as a template, drill the bolt holes completely through the joist. 3. Secure the saddles in place with the bolts, nuts, and washers. The supplied washers should bear against the wood joists and not the steel plates of the saddle supports. 4. Measure the distance between the plates of the saddle supports and cut (2) – 2x8s or 2x10s to the appropriate length to fit, and slide the lumber into the slots. Note: installed gaps should not exceed 0.25 inch. 5. Place the 5-inch square plate with welded nut against the newly installed lumber centered horizontally and vertically and secured with nails through the holes in the plate. The welded nut should be pointed toward the wall to be supported by the PowerBrace system. 6. Complete the installation of the remaining PowerBrace components (beam, lower bracket, tightening bolt, 2x2 wood strips with construction adhesive, etc.) per standard installation procedures. Ch APTER 5 PowerBrace Installation with Wood I-Joists © 2023 Supportworks® All Rights Reserved 20 Chapter 5 PowerBrace Installation with Wood I-Joists CHAPTER 5: PowerBrace Installation with Wood I-Joists Figure 5.1 Figure 5.2 © 2023 Supportworks® All Rights Reserved 21 Chapter 5 PowerBrace Installation with Wood I-Joists Bridge Bracket Installation – Joists Perpendicular to Wall Measure the joist depth (D), flange width (W), the clear depth between flanges (Y), and the clear width to web (X) (Figure 5.3). Wood I-Joists can have a nominal spacing wider than what is common for 2x sawn lumber joists (16 inches). For this reason, the outlined procedure shows the use of the alternate wood bridge bracket. This process can also be used with the standard steel bridge bracket in circumstances where the measured distance between the inside surfaces of the modified joists is between 13.5 and 16.5 inches. Figure 5.3 1. For both of the joists that the bridge bracket will attach to, cut pieces of oriented strand board (OSB) or plywood to infill and cover one side of the joists. Cut all boards to a length of 4 feet. Use multiple infill boards of varying thickness as needed to create a flush surface (within 0.13 inch) at the edges of the joist flanges (Figure 5.4). Cut the infill boards to a height that matches the clear depth between the flanges (Y) (Figure 5.3). Cut the cover board to a height that matches the joist depth (D) out of material that is at least ½" thick (Figure 5.4). The modified total thickness in the center of the joist should be at least 1.5 inches including the cover board, infill boards, and the original joist web. It may be necessary to use a cover board that is thicker than the infill boards to meet this requirement. Figure 5.4 © 2023 Supportworks® All Rights Reserved 22 Chapter 5 PowerBrace Installation with Wood I-Joists 2. Secure the infill and cover boards with construction adhesive and wood screws. Apply the construction adhesive to all joints at the faces and edges between the boards, the joist components, and the subfloor above (Figure 5.5). Figure 5.5 3. Fasten the infill and cover boards with four rows of #6 screws 3 inches from the ends of the boards and spaced a maximum of 6 inches. The top and bottom rows should be centered on the joist flanges. The other two rows should fasten through the web. Use screws long enough to penetrate the cover board, all the infill boards, and the joist web (Figure 5.6). Alternately, 10d or 12d common nails may be used as long as they have sufficient length to penetrate all of the boards just described. Figure 5.6 © 2023 Supportworks® All Rights Reserved 23 Chapter 5 PowerBrace Installation with Wood I-Joists 4. Complete the installation of the remaining bridge bracket components per standard installation procedures. Longer bolts will be required when the total thickness of the wood exceeds 2 inches. Note: Drilling through the joist flanges is not permitted (Figure 5.7). Figure 5.7 Lever Bracket Installation – Joists Parallel to Wall 1. For all joists where the steel runner will attach, cut pieces of oriented strand board (OSB) or plywood to infill and cover both sides of the joists. Cut all boards to a length of 2 feet. Follow the same installation procedure to secure these boards as was outlined previously in the bridge bracket section (Figures 5.8 and 5.9). Figure 5.8 Figure 5.9 © 2023 Supportworks® All Rights Reserved 24 Chapter 1 PowerBrace Installation with Wood I-Joists 2. The remainder of the PowerBrace blocking can be cut from standard sawn lumber and installed per standard installation procedures, but since the reinforced I-joists are much thicker than sawn lumber joists, the blocking will need to be secured through toe nailing or toe screwing the blocking to the joists (Figure 5.9). The sawn lumber blocking may also have to be cut to match the depth of the I-joist. 3. Complete the installation of the remaining PowerBrace components (lever bracket, steel runner, lower bracket, tightening bolt, etc.) per standard installation procedures (Figures 5.2 and 5.10). Figure 5.10 Ch APTER 6 Concrete Angle Bracket Installation © 2023 Supportworks® All Rights Reserved 26 Chapter 6 Concrete Angle Bracket Installation CHAPTER 6: Concrete Angle Bracket Installation Figure 6.1 Figure 6.2 Summary The PowerBrace bridge bracket and lever bracket systems are designed to connect to wood floor joists. In circumstances where there is a concrete slab instead of wood floor joists, a special top bracket is required. The concrete angle bracket may be used as the top bracket of the PowerBrace system to connect to cast-in-place slabs and concrete slabs placed over metal deck. Connection to lightweight concrete or hollowcore planks should be evaluated by the project engineer. Installation 1. Cut the PowerBrace beam to a length that locates the top of the beam (at final assembly) roughly 0.25 inch below the underside of the slab that the bracket will be mounted to (Figure 6.3). 2. Using the concrete angle bracket as a template, mark and drill holes for the concrete screw anchors. The front of the bracket should be located a minimum of 1.75 inches behind the PowerBrace beam when the PowerBrace beam is placed firmly against the bottom of the deflected wall (Figure 6.3). Figure 6.3 © 2023 Supportworks® All Rights Reserved 27 Chapter 6 Concrete Angle Bracket Installation a. For concrete over metal deck slabs with deck flutes that are perpendicular to the wall to be stabilized, use (6) anchors in Configuration 1 (Figure 6.6). The bracket must be positioned so the concrete anchors are centered on the bottom of the metal deck flutes. Figure 6.4 b. For concrete over metal deck slabs with deck flutes parallel to the wall to be stabilized, use (5) screw anchors in Configuration 2 (Figure 6.6). The bracket must be positioned so the concrete anchors are centered on the bottom of the metal deck flutes (Figure 6.4). c. For flat exposed concrete slabs, use (6) anchors similar to Configuration 1 (Figure 6.6). Remove any formwork or shoring that was used during concrete placement so the bracket can be mounted directly to the concrete surface (Figure 6.5). Figure 6.5 © 2023 Supportworks® All Rights Reserved 28 Chapter 6 Concrete Angle Bracket Installation Figure 6.6 3. Install the concrete anchors and the remaining PowerBrace system components per standard installation procedures. Ch APTER 7 Bottom Beam Embedment in Concrete Floor Slab © 2023 Supportworks® All Rights Reserved 30 Chapter 7 Bottom Beam Embedment in Concrete Floor Slab Chapter 7: Bottom Beam Embedment in Concrete Floor Slab Figure 7.1 Summary The standard bottom connection for PowerBrace installations utilizes a steel angle bracket with two concrete screw anchors. Bowing CMU block walls typically show maximum inward movement at a horizontal crack along a mortar bed joint. This point of maximum displacement most often occurs in the upper courses of the block wall. If the maximum inward movement occurs lower than 5 bed joints from the top of the wall (40 inches), then the bottom of the beam should be embedded in the concrete slab rather than using the standard bottom bracket assembly. Installation 1. At the edge of the slab where the bottom of the PowerBrace beam will be installed, saw cut and remove the concrete slab to an elevation at least 4.0 inches below the top of the slab. The removed slab should be 12 inches wide and should also be at least 4.0 inches inside the interior flange of the installed beam (Figure 7.2). Edges should be made as straight and uniform as practical and should be free of debris. This may require removal of the top of the concrete footing. Figure 7.2 2. Proceed with the remainder of the installation per standard installation procedures up to the point where it’s time to tighten the system. With the bottom of the beam placed firmly against the foundation wall, adjust the tightening bolt at the top bracket to remove any gaps in the system, but DO NOT TIGHTEN. 3. Place concrete around the bottom of the PowerBrace beam. Concrete should make full contact with the wall, the concrete slab edges, and the beam. It may be necessary to temporarily restrain the PowerBrace beam while the concrete hardens. 4. After allowing the concrete to set for five days, tighten the tightening bolt to the specified torque per standard installation procedures. Ch APTER 8 PowerBrace Under Stairs © 2023 Supportworks® All Rights Reserved 32 Chapter 8 PowerBrace Under Stairs Chapter 8: PowerBrace Under Stairs Summary GeoLock® Wall Anchors are not always an option when permanently stabilizing walls which have stairs located adjacent to the wall. This set of guidelines may be used in this circumstance. Installation For Stairs Along The Wall 1. Layout PowerBrace Stair (PBS) locations on the wall with duct tape according to SolutionView®. a. If installing a diagonal beam, at least two PBS must be installed (Figure 8.14). b. To locate the placement of the EverBrace™ (EB) post along the outside stringer, place a speed square and straight edge or a drywall square up against the wall and underneath the duct tape mark (Figure 8.1) using a level, draw a line out away from the wall approximately 10 inches past the outer stringer (Figure 8.2). c. The horizontal SJQ350 tube should be a minimum 18" from the floor. Figure 8.1 Figure 8.2 18" Minimum © 2023 Supportworks® All Rights Reserved 33 Chapter 8 PowerBrace Under Stairs 2. At each of the EB post locations, measure from the floor up to the bottom of the floor joist and add 2" to each measurement. Cut the posts length. Posts should not be longer than 9' 2". 3. Hold PowerBrace Stair Top Bracket (PBSTB) up against the bottom of the floor joists at first PBS location (Figure 8.3). a. Use plumb-bob level, or other similar device to locate center of bracket over the PBS mark on th floor. b. When floor joists run parallel to the wall, blocking must be installed in the joist cavities. c. Top bracket must be supported on both sides of the EB post. d. Mark joist blocking locations to support top bracket. 4. Measure and cut 2 wood blocks to fit in the first cavity (Figure 8.4). a. Add Construction Adhesive on 3 sides that touch the existing wood, then install the blocks. Secure blocking to existing floor joist on both sides with nails or screws. Figure 8.3 Figure 8.4 © 2023 Supportworks® All Rights Reserved 34 Chapter 8 PowerBrace Under Stairs 5. Stand up EB post in joist cavity (Capture Bracket faces wall). a. Slide PowerBrace Stair Capture Bracket (PBSCB) and (PBSTB) on post and secure it with locking pliers (Figure 8.5). Capture Bracket and Top Bracket must be on opposite sides of the beam. 6. Place the PowerBrace Stair Bottom Bracket (PBSBB) near the install location and set the post into it. The PBSBB can be orientated on the front or back flange. 7. Align Top Bracket with slots/holes centered on blocking. 8. Fasten Top Bracket to blocking/joists (Figure 8.6a). a. Install 6 screws (#10x2”) through the top bracket, 3 each side of EverBrace beam (Figure 8.6b). The sets of (3) screws must be installed in-line from front to back. Figure 8.5 Figure 8.6b Figure 8.6a PBSTB Pliers PBSCB Pliers © 2023 Supportworks® All Rights Reserved 35 Chapter 8 PowerBrace Under Stairs PBSTB and Blocking Guidelines • 2x sawn lumber blocking needs to be the full depth of floor joists and fit as tight as possible. • The full depth vertical blocking must be bonded to the subfloor and adjacent joists with construction adhesive and also nailed or screwed to the adjacent floor joists. • #10 x 2 or 2.5 inch wood screws are required to fasten the PBSTB and PowerBrace Stair Top Bracket Runner (PBSTBR) to blocking and joists. • 4 sets of vertical blocking must be provided to support both sides of the PBSTB (Figure 8.7). • The PBSTBR must align with the holes used in the PBSTB (Figure 8.6b). • The set of holes/slots used in the PBSTB can offset the post (Figure 8.8). This is beneficial when joists run perpendicular to the wall. • If required, one vertical set of blocking may be laid flat to avoid obstacles indicated in (Figure 8.8). • If two vertical sets of blocking must be laid flat to avoid obstacles, an extra vertical block set must be added at the end (Figure 8.9). Figure 8.7 Figure 8.8 © 2023 Supportworks® All Rights Reserved 36 Chapter 8 PowerBrace Under Stairs Figure 8.9 9. Align runners with top bracket screws (Figure 8.10). a. Align runners square and tight against top bracket. b. If joists are parallel to the wall, mark both runner edges along the bottom of the floor joists to locate later blocking. 10. Cut and install remainder of blocking (if joists are parallel). 11. Install runners using #10x2 or 2.5 in. wood screws in each hole. 12. Plumb EverBrace post. Figure 8.10 © 2023 Supportworks® All Rights Reserved 37 Chapter 8 PowerBrace Under Stairs 13. Drill 6 – ø½” holes through bottom bracket into the slabs. a. Clean holes and place NexusPro® in the anchor holes. b. Anchor bottom bracket to the floor with 6 screw anchors using a ¾” socket. Note: If wall Shear is present, continue to step 14, if not, move to diagonal beam installation step 22. Vertical Wall Beam (Figure 8.11) 14. Measure and cut the PowerBrace (PB) beam to fit vertically under the stair stringer. 15. Slide the SmartJack® 350 S4 capture plate (SJQ350S4) onto the PB beam. 16. Install PowerBrace Bottom Bracket (PB2BB1), with bottom of beam against the wall. 17. Measure from EB post to vertical PB beam, subtract 4.5” and cut the 3.5” SJ tube to length. a. Place SJQ350PCK on one end of the SmartJack tube. b. Slide PBS Capture Backet up the EB post while placing the 3.5”SJ post in bracket. 18. Raise SmartJack (SJ) assembly and plumb the PB beam to max height under stair stringer, hold in place with Locking Pliers (Figure 8.12). Figure 8.11 © 2023 Supportworks® All Rights Reserved 38 Chapter 8 PowerBrace Under Stairs 19. Attach PBS capture bracket to EB post and SJQ350PCK to SJQ350 post with sheet metal screws. 20. Level SJ assembly and tighten by hand. 21. Repeat steps 14-19 for additional uprights. 22. Tighten the system. a. Using the Crow Foot Wrench, tighten PBS assembly to 85 ft/lbs of torque (Figure 8.13). b. Traditional full height PowerBraces to be torqued to 45-50 ft/lbs. Figure 8.12 Figure 8.13 © 2023 Supportworks® All Rights Reserved 39 Chapter 8 PowerBrace Under Stairs Diagonal Beam Installation (Figure 8.14) 23. Measure and cut the beam to run parallel to the stair stringer leaving 1-1/2” space (Figure 8.14). a. Attach beam to stringer using plumbing strap (Figure 8.16). b. Place SJQ350TPS4 brackets on the beam. 24. Measure from EB post to vertical PB beam, subtract 4.5” and cut the 3.5” SJ tube to length. a. Place SJQ350PCK on one end of the SJQ350 tube. 25. Locate TPS4 bracket on diagonal beam (according to layout) with pliers. Figure 8.14 Figure 8.15 Figure 8.16 © 2023 Supportworks® All Rights Reserved 40 Chapter 1 PowrBrace Under Stairs 26. Raise SJ assembly to match TPS4 height (make sure assembly is square to the wall). 27. Attach PBS capture bracket to EB post and SJQ350PCK to SJQ350 post with sheet metal screws. 28. Level SJ assembly and tighten by hand. 29. Repeat steps (24-27) for additional assemblies. 30. Tighten the system. a. Using the Crow Foot Wrench, tighten PBS assembly to 85 ft/lbs of torque (Figure 8.13). b. Traditional full height PowerBraces to be torqued to 45-50 ft/lbs. © 2023 Supportworks® All Rights Reserved 41 Chapter 1 PowrBrace Under Stairs Notes _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ © 2023 Supportworks® All Rights Reserved 42 © 2023 Supportworks® All Rights Reserved 43