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HomeMy WebLinkAboutPOWERBRACE system F[JWqFOUNDATION REALL INFORCEMENT IMMUTPOWERBRACE INSTALLATION I PowerBraceTM System Installation Instructions and Spacing Guidelines This document is the property of Power Brace, LLC. It must be accounted for at all times. Information herein is confidential. Do not reproduce or reveal the contents to any unauthorized persons. It is not to be distributed without prior consent from Power Brace, LLC. -----� A -----I DETAIL A SCALE .5 ©2015 Power Brace, LLC PB-INST Rev. 002 01/2015 POWERBRACE INSTALLATION 2 Abstract The PowerBraceTM is a patented system designed and manufactured by PowerBrace, LLC and is a proven method to laterally support bowed, leaning and sheared foundation walls. The system has been used for over a decade and thousands of successful installations have been completed throughout the United States and Canada.The PowerBraceTM is a patented system that,when installed properly, will not only stabilize foundation walls against further appreciable lateral movement, but also in many cases improve the wall's position and partially or fully straighten it. POWERBRACE INSTALLATION 3 PowerBraceTM System Installation Instructions and Spacing Guidelines The purpose of this document is to assist with choosing the proper size, spacing, and installation style of the PowerBraceTM System. While each installation can be unique,they can be grouped into several distinct categories, depending on the existing structure's construction. Each category shall contain its own special instructions and materials during installation. Special materials and custom fabrication may also be required depending on the application. Determining Existing Construction The first step in the PowerBraceTM installation is determining the existing structure's floor joist construction. There are 3 general types (floor joist material), and 2 variances (perpendicular or parallel to wall). The different types and variances will determine how the PowerBraceTM system will be installed. Type One: Dimensional Lumber Standard Dimensional Lumber is the most common floor joist type. Perpendicular: If the floor joists are perpendicular(90°) to the wall in which the PowerBraceTM System is to be installed, there are no additional fabrication or special instructions. (Figs. 1, 2) Parallel: If the floor joists are parallel to the wall in which the PowerBraceTM System is to be installed, a 2"x10"x8'bottom runner shall be installed perpendicular to the floor joists. Runner should extend at least 1 1/z"past the last joist to prevent splitting. Bridging between the joists shall be constructed using 2"-by lumber. 16D nails shall be used as fasteners. Each bridge shall be toe nailed into joists. There shall be 3 nails across bottom of runner edge-to-edge, into each joist, and 3 nails down center of runner, into each bridge. The PowerBraceTM top bracket shall be rotated 90' around 1.00"Bolt axis and mount to the bottom runner. (Figs. 3, 4) POWERBRACE INSTALLATION 4 Fig. _ III �111� s POWERBRACE INSTALLATION 6 Type Two: Engineered I-Joists Engineered lumber is becoming more popular among new construction, and is still able to accept the PowerBraceTM System. Custom fabrication is required to install the PowerBraceTM System because of the Engineered I-Joist's unique design. Perpendicular: 2"-by dimensional lumber shall be cut to fill the space between the top and bottom flanges and attach to the face of the web on both sides of joist. The lumber shall extend out 8' from basement wall. 16D nails shall be used to assemble, followed by four 3/4"bolts spaced equally across face of lumber. The top bracket is then attached to the face of the dimensional lumber, and installation resumes as if it were a standard install. This is to ensure the top bracket does not break the web once the adjustment bolt is tightened. (Figs. 5, 6) Parallel: If the I joists are parallel to the wail in which the PowerBraceTM System is to be installed,a 2"xl0"x8'bottom runner shall be installed perpendicular to the floor joists. The runner should extend 1 '/Z"past the last I joist to prevent splitting. 2"-by lumber 4' long shall be installed on both sides of web, centered along runner, on all I joists being bridged. Bridging between the joists shall be constructed using 2"-by lumber. 16D nails shall be used as fasteners. Each bridge shall be toe nailed into I joists. There shall be 3 nails across bottom of runner edge-to-edge,into each joist, and 3 nails down center of runner, into each bridge. The PowerBraceTM top bracket shall be rotated 90' around 1.00"Bolt axis and mount to the bottom runner. (Figs. 7, 8) POWERBRACE INSTALLATION e o Fig. 6 i i POWERBRACE INSTALLATION 9 Type Three: Open-Web Trusses Open-web floor trusses are another increasingly popular alternative to standard floor joists. They are generally comprised of 2x4's and are built similar to roof trusses. These are also a viable candidate for the PowerBraceTM System. Like I-Joists,trusses will need custom fabrication before installing the PowerBraceTM Top Bracket. Perpendicular: 2"-by dimensional lumber shall be cut to cover the face of the floor truss,on both sides of the truss. The lumber shall extend out 8'from the basement wall. 16D nails shall be used to assemble, followed by four 3/4"bolts spaced equally across face of lumber. The top bracket is then attached to the face of the dimensional lumber, and installation resumes as if it were a standard install. This is to ensure the top bracket does not break the web once the adjustment bolt is tightened. (Figs. 9, 10) Parallel: If the floor trusses are parallel to the wall in which the PowerBraceTM System is to be installed, a 2"x10"x8'bottom runner shall be installed perpendicular to the floor trusses. The runner should extend at least 1 '/2"past the last truss to prevent splitting. Bridging between the trusses shall be constructed using same size lumber as trusses. 16D nails shall be used to assemble. Each bridge shall be toe nailed into trusses. There shall be 3 nails across bottom of runner edge-to-edge, into each truss, and 3 nails down center of runner, into each bridge. The PowerBraceTM top bracket shall be rotated 900 around 1.00"Bolt axis and mount to the bottom runner. (Figs. 11, 12) POWERBRACE INSTALLATION 1 0 0 POWERBRACE INSTALLATION r, Von 3 I ]IL Fig. 12 �111� I �111� 111� a POWERBRACE INSTALLATION 12 i Beam Offsets Occasionally, existing plumbing, electrical, or HVAC cannot be relocated to make room for the PowerBrac6rm beam. The beam can be cut and a 90' offset fabricated to work around obstructions. The offset shall not be more than 2'-0"horizontal and 10"vertical. (Fig 13) The beam sections shall be all-around field welded and the welds re-coated with a zinc-rich spray paint. Welding should be completed by a trained and experienced welder. (Fig 14) *Note: The figures below are for illustrative purposes only and may not match your exact application, including joist material and/or perpendicular or parallel joists. k POWERBRACE INSTALLATION FF�l 2' - 0" MAX 10" MAX Fig 13 yu Fig 14 POWERBRACE INSTALLATION 14 PowerBraceTM System Spacing Guidelines Spacing of the PowerBraceTM System will depend on the wall height and the unbalanced fill height. f, Wall Height (ft.) 4 5 6 7 8 s°-A 9 .� = 4 5 5 5 5 5. 5 5 5 5 5 5 U 6 5 5 5 4.5 M 7 5 4.5 4 g 4 3.5 :3 g L 3 NOTES: 1. Maximum recommended spacing from corners is 2 feet. 2. Spacing could be less than listed in the above chart based on the condition of the wall and severity of wall displacement. 3. Because variations in building design and construction materials are common,PowerBraceTM applications should be reviewed by a qualified professional. I� I POWERBRACE INSTALLATION 15 Technical Specifications Steel Beam: S4 x 7.7 lb. /ft. x 2.66"Flange,ASTM A572 GR 50 Standard I-Beam Tensile Strength= 65 ksi (min.),Yield Strength=50 ksi (min.) Mounting Brackets: (1) 5.00"x 3.00"x 3.00"x 0.375"thick two-hole mounting"L"Bracket or (1) 5.00"x 5.50"x 3.00"x 0.375"thick four-hole mounting"L"Bracket, and (1) 5.50"x 2.00"x 1.25"x 0.25"thick two hole "L"Bracket,ASTM A36 Mounting Hardware: (1) 1.00"x 5.00"Grade 5 Bolt and Nut (2) 0.75"x 3.00" Grade 5 Bolts and Nuts (2) 0.75"x 2.50" Concrete Sleeve Anchors Finish: System components and hardware are zinc plated in accordance with ASTM B633. Alternate Beam: W4 x 13 lb. /ft. x 4"Flange,ASTM A572 GR 50 Wide Flange Beam Tensile Strength= 65 ksi (min.),Yield Strength=50.ksi(min.) Installation hardware remains the same except a larger Channel Bracket. Custom brackets may be necessary. I k ki f POWERBRACE INSTALLATION 16 1 t.0 I Z!i A I a7U.t71 owns= Lt�0.t so lk 1 F/11.111/9�IiyT wT -xr xw i POWERBRACE INSTALLATION 17 Disclaimer: The guidelines and recommendations contained herein are for typical installations only. There may be a time when further customization and existing property modification may be needed. These guidelines are not all-inclusive and good judgment should be made by the installing contractor regarding the effectiveness and integrity of the PowerBraceTM System and the existing structure. If there is any doubt regarding the safety or integrity of any structure,the contractor shall consult with a qualified professional such as a Structural or Architectural Engineer. y I