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Home My WebLink About22-6172-1rep051722 SCHIMNOWSKI CRITERIUM® ENGINEERS May 17, 2022 Marc Nelsen Submitted via email to: nelsenmarc@gmail.com RE: Proposed Modifications to Existing Structural Elements Project Location: 235 Logan Pkwy. NE, Fridley, MN 55432 Project No. 22-6172-1 Dear Mr. Nelsen: This letter is being sent to discuss the proposed revisions to the existing house at the above address as related to: the proposed removal of wall between the kitchen and the living room and the proposed new stair opening into the basement. A preliminary design letter dated April 20, 2022, was previously provided. The scope of my work included the following: 1. An interview of you regarding a history of the property and performance of the structure. 2. Requesting from you any other information relevant to the evaluation of the structure. 3. Visual observations during a physical walk-through on April 18, 2022. 4. Observe factors influencing the performance of the structure 5. Provide a report/letter containing the following: a. Scope of services b. Observations, site characteristics, and data deemed pertinent by me. c. Discussion of major factors influencing structural performance and rationale in reaching conclusions concerning the subject residence when pertinent. d. Conclusions and recommendations for proposed renovations. e. Beam size and bearing information. f. Please note that architectural drawings/construction plans are not included in our standard scope of work. 6. This inspection is limited to: An assessment of the structural characteristics of the interior stud wall and floor framing to be modified and the nearby, or related, structural elements as determined by the engineer. 7. This design/analysis required engineering calculations to be performed. Those calculations were completed by Steve Eiker, P.E. and his stamp is included in the signature line 8. Please note that this design is based information obtained at site visit, and relies on visible evidence at time of inspection. SUMMARY In my professional opinion, the wall between the kitchen and the living room is a primary load-bearing wall. The new openings will need to be supported with a structural post and beam system. The size of the beams has been determined based on the proposed openings as shown on the set of plans that you provided. Refer to the Recommendations section of this letter for further information. Please note that the beam and post sizes listed are considered final unless exposure of concealed conditions reveals new information. The design is based on visible evidence at time of inspection. If new conditions are found, contact me to determine whether changes to beam and post sizes are required. Independently Owned and Operated 161 Dunbar Way/Mahtomedi, MN 55115 O: 651.779.7700/criterium-schimnowski.com 235 Logan Pkwy. NE, Fridley, MN May 17, 2022 Page 12 Similarly, if a different product or project layout is proposed, please contact me for additional information. INSPECTION DETAILS • Our client, to whom this report is addressed, is the homeowner. • The client was present during our site visit. • The following areas were inaccessible or not visible, and this limited the extent of our structural inspection: o Portions of the attic area o Most of the foundation system and slab (underground and/or concealed due to finished conditions) o Wall and floor framing (concealed) DESCRIPTION OF STRUCTURE • This building is a one-story single-family home. • The house has a full basement. • The structure was constructed in 1954 with an addition in 2002. • The front of the house faces south. DOCUMENT REVIEW In conjunction with this investigation, the following document was provided for review: • Architectural Plans dated 4/27/22, prepared by JDH Design (Jeff Haugstad) for March and Sandy Nelsen This document was considered when rendering our professional when providing design specifications. SITE OBSERVATIONS Three openings are planned between the existing kitchen and living room. The proposed spans are 3'-9" and 5'-6" as shown in attached plan. The width of the uniformly distributed load from the roof framing (tributary width) is 14 feet. A stair opening is planned in the main floor to get down to the basement. The proposed opening size is approx. 12'-9"x 4'-0". Creating this opening will require a new beam, a post, and a concrete footing for support of the floor joists. The basement evaluation is limited to the area related to the modification above. The first-floor joists in the corresponding area of the basement are supported by a wood beam and an interior wall in good condition. The first-floor joists in that same area of the basement are in good condition. The attic space is in good structural condition. There is adequate ventilation. There is no flooring in place. The roof rafters and ceiling joists are in good condition. RECOMMENDATIONS KITCHEN/DINING ROOM WALL - BEAM & POST DETAILS: The three openings for the wall between the kitchen and the dining room should be spanned with 2-2x10's as shown in attached redlined plan. Independently Owned and Operated 161 Dunbar Way/Mahtomedi, MN 55115 O: 651.779.7700/criterium-schimnowski.com 235 Logan Pkwy. NE, Fridley, MN May 17, 2022 Page 13 The horizontal bearing length at each end of the beam must be a minimum of 3.0 inches for the full width of the beam. The posts need to extend to existing wood beam below. The existing wood beam and wood columns below will adequately support the load. NEW STAIR OPENING BEAM & POST DETAILS: The new beam for the stair opening into the basement shall be 9.25-inch deep by 3.5-inch wide (2 plies) of 2.0E veneer lumber (LVL). LVL beams are widely available in 1.75-inch-wide increments (called plies)which can be connected to create wider beams. The beam shall bear on a new 4x4 wood column with an "EPC4Z" post cap by Simpson or equal. The column shall have an "ABA44Z" post base by Simpson or equal and bear on a new 2'-0"x 2'- 0"x 10" concrete footing with 344 rebar each way at the bottom, providing 3" clear to the rebar. See attached redlined plan for further clarification. WORKING WITH LVL BEAMS: Compared with similar size sections, the 2.0E veneer lumber LVL beams that I am recommending can support heavier loads than conventional lumber though in this case, both LVL and wood will require essentially the same size beam. Failure to follow good procedures for storage, handling and installation of the LVL beam can result in unsatisfactory performance and unsafe structures. Understanding and following manufacturer specifications and requirements, including connection detailing, is critically important. For your convenience, I've included additional information regarding ply connection in the section below. However, please note that the manufacturer specifications and requirements always take precedence over the information included here. PLY CONNECTIONS: The individual LVL plies must be connected to each other (sistered) with approved fasteners. This should be according to the manufacturer's specifications such that the plies act as a single unit/beam and not as several separate units/beams. A maximum of four LVL plies can be fastened together. Proprietary screws have been designed specifically for LVL multi-ply fastening for example: TrussLok screws manufactured by FastenMaster, and SDW screws, manufactured by Simpson Strong-Tie. Bolts are not recommended as fasteners. The LVL beam ply fasteners are usually galvanized (for example if nails are utilized) or Teflon coated (for example screws). The proprietary screws are sold in lengths that correspond to the number of plies being connected. However, check with the beam manufacturer for their sister recommendation process and recommended fasteners/nails/screws. The beams upon delivery are often-times bowed. There is a process for counteracting that during the sister/connection process. Additional information is available in the TrussLok Technical Bulletin which will guide you on the proper spacing of the fasteners and how many to use for your depth of beam. Note that you can countersink the heads. TYPICAL WORK SCHEDULE: Generally, the schedule of work will include the construction of temporary support wall for the ceiling joists, removal of the existing wall, installation the beam and posts, and removal of the temporary support. Independently Owned and Operated 161 Dunbar Way/Mahtomedi, MN 55115 O: 651.779.7700/criterium-schimnowski.com 235 Logan Pkwy. NE, Fridley, MN May 17, 2022 Page 14 DESCRIPTION OF TERMS Terms used in this report to describe the condition of observable components and systems are listed and defined below. It should be noted that a term applied to an overall system does not preclude that a part or a section of the system or component may be in different condition: Excellent- Component or system is in "as new" condition, requiring no rehabilitation, and should perform in full accordance with expected performance. Good- Component or system is sound and performing its function. Although it may show signs of normal wear and tear, some minor rehabilitation work may be required. Fair- Component or system falls into one or more of the following categories: a) Evidence of previous repairs not in compliance with commonly accepted standards, b) Workmanship not in compliance with commonly accepted standards, c) Component or system is obsolete, d) Component or system approaching end of expected performance. Repair or replacement is required to prevent further deterioration or to prolong expected life. Poor- Component or system has either failed or cannot be relied upon to continue performing its original function as a result of having exceeded its expected performance, excessive deferred maintenance, or state of disrepair. Present condition could contribute or cause the deterioration of other adjoining elements or systems. Repair or replacement is required. SCOPE OF SERVICES and LIMITATIONS The purpose of this inspection and report/design is to evaluate the current condition of the structural system of this building as related to the proposed modifications. The report is not to be considered a guarantee of condition and no warranty is implied. Our evaluation of this structure is based on many indirect observations. Examination of the foundation is completed without excavation; therefore, we cannot be certain of the condition below grade. Additionally, we cannot certify that the footings extend below the frost line. We cannot see most of the framing. We look for cracks, bulges, and other evidence of distress or deterioration to help us evaluate the condition. In addition, often, construction details cannot be known and we then assess that system with typical construction practices for our area in mind. As with any limited inspection, it is possible that there are structural deficiencies that cannot be known. This scope of this inspection does not include a comprehensive evaluation for code compliance, governmental regulation compliance, fire safety, or hazardous materials in or around this building. It does not include an inspection of heating, cooling, plumbing and electrical systems or repair designs. Inspecting for mold is not included in the scope of a structural inspection. Our services do not include determining the presence of a virus in this building. Evidence of any moisture-related problems in the home is not always visible. We cannot be responsible for any such conditions that might be discovered later. This report/design is based on an examination of the structural system and is based on evidence available during a diligent inspection of all reasonably accessible areas. No surface materials were removed, no destructive testing undertaken, nor furnishings moved. This report is not an exhaustive technical evaluation. As Professional Engineers, it is our responsibility to evaluate available evidence relevant to the purpose of this inspection. We are not, however, responsible for conditions that could not be seen or were not within the scope of our service at the time of the inspection. Independently Owned and Operated 161 Dunbar Way/Mahtomedi, MN 55115 O: 651.779.7700/criterium-schimnowski.com 235 Logan Pkwy. NE, Fridley, MN May 17, 2022 Page 15 CLOSING Opinions and recommendations in this report are limited to the scope of work. This report has been prepared in strict confidence with you as our client. Reliance upon our report by other parties is strictly prohibited. If you choose to share our report, you agree to indemnify, defend and hold harmless the Engineer from any third-party action. No reproduction or re-use is permitted without express written consent. Further, we will not release this report to anyone without your permission. If project conditions or other parameters vary from that assumed or stated, a revised analysis may be needed. If additional documentation or information is made available for review, I reserve the right to amend or add to the opinions and observations presented in this report. Please call with any additional questions you may have. Thank you for the opportunity to be of assistance to you. Sincerely, I hereby certify that this plan, specification, or report was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota. l Steve Eiker, P.E. MN#52681 Steve Eiker, P.E. 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