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4057 Northview Ter - Framing Inspection ReportField Report Project: Hermanson Remodel 4057 Northview Terrace Eagan, MN 55123-1555 Date: 12/9109 Time: PM Notes: Voigt & Associates, Inc. STRUCTURAL ENGINEERLVG SERVICES 4635 NICOLS RD. SUITE 204 EAGAN, MN 55122 PR. (651)6b67727 FAX. (651) 686-8444 Observation Report Proj # 2009-180 by RNS Present at Inspection: Corey Hedstrom of Manley Renovations and his framer The job is a single family residence addition. The house is two stories with a gabled truss roof system clear spanning from front to rear. The floors are joisted front to rear with varying bearings along the middle of the structure. The addition on the rear of the house necessitated the removal of 20 feet of rear exterior bearing wall and the installation of a beam in the ceiling of the main level of the home to carry the second floor load to the foundation. The second floor above the addition is cantilevered and the roof truss bearings appear to be borne by a beam that carries the roof load around the 20 foot opening for the addition. The original LiteSteelBeam was sized to carry only the second floor load and exterior wall. The problem is that the beam that carries the roof over the cantilevered portion of the second story does not completely span the 20 foot opening for the addition. A concealed bearing was found about 6' from the garage end of the addition opening. The owner would like to eliminate this column. The existing single 1200LSE3350-118 LiteSteelBeam is undersized for the unanticipated additional load. Remedial work required: 1. Double the existing LiteSteelBeam 1200LSB350-118. Install them back to back and laminate them with 2- bolts at a maximum of 6' intervals OR #12 Teks 4 self tapping screws staggered at 1' intervals with 2 screws at the end evenly spaced. This is the manufacturer's specification (attached). 2. A web stiffener must be installed at the bearing on the garage /laundry room end of the beam. Use one of the three methods detailed by the manufacturer (attached). 3. The column bearing under the new composite beam must be centered (within 1") under the back to back LiteSteelBeam webs. The column may be a composite of 4 -2X6 #2 SPF nail laminated (6" staggered each lamination) to act as a composite column. The information and opinions contained herein are based upon the limited investigation described at the beginning of this report. No warranties are expressed or implied regarding the existence of other unknown conditions not specifically addressed. Our work is in accordance with generally accepted engineering standards and is riot intended to be relied upon or transferred to individuals other than the addressee. Should information or conditions become known which differ from the discussion herein, they may alter the opinions or conclusions of the undersigned. Please call if you have any questions. Sincerely, Rex Swanson, PE Hereby Certify That This Plan, Specification, Or Report Was Prepared By Me Or Under My Direct Supervision And That 1 Am A Duly Licensed Engineer Under The Laws Of The State Of Minnesota_ Voigt & Associates, Inc. I STRUCTURAL ENGINEERING SERVICES 4635 NICOLS RD. SUITE. 204 -° EAGAN, MN 55122 PH. (651) 686 -7727 FAX. (651) 686 - 8114 i 6 fl oi h 6 c 41 g/ LSB Back-to-Back for Added Strength LSB is generally used as a single beam or girder. They may also be used in the back-to-back configuration. Reasons for using LSB back-to-back include: Need for greater carrying capacity or greater span than from a single LSB In remodeling and other applications that need to use shallowest beam Need for beams of lightest weight to facilitate movement on-site Assembling LSB Back-to-Back When using LSB back-to-back, they should be fastened together: Using two 1/2 bolts at six foot intervals ...or Using #12 Teks 4 self-taping screws, staggered at one foot intervals, and two screws at the ends evenly spaced t U (.0 LSB beams often requre a web stiffener at supports and at point load locations. Stiffeners should be used unless a design professional determines they are not required. For concentrated point loads exceeding 10.000 pounds consult a design professional. The stiffener can be a half section of LSB, a pair of wood studs. or a steel stud. The stiffener should fit snugly between the LSB beam flanges. Option 1: Half LSB Section Section of LSB of same flange depth, cut in half longitudinally, and cut to length to fit tight between the LSB flanges. 3-#12-24 x 1-1/2" hex head Teks® screws with #5 drill point (Buildex part number 1070000) Option 2: 2 x 4 Wood Studs 2 x 4 #2 wood studs, cut to length to fit tight between the LSB flanges. 2 nominal face of wood studs is against LSB beam web. 3 11 gauge type 17 wood screws each stud. Pre-drill 7/32 for screws through LSB web. Option 3: 350S162 Steel Stud 350S162-54 steel stud, cut to length to fit tight between the LSB flanges. Web of steel stud is against LSB beam web. 4-#12-14 x 1-1/4 head Teks® screws with #2 drill point (Buildex® part number 1120000)