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City of Bellevue, WA Development Services
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Structural or Lateral Calculations

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  7. Structural or Lateral Calculations
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    Plan Submittal Resources

    • Addressing Site Plan
    • Administrative Departures
    • Architectural Plan
    • Assessors Map
    • Basic Site Plan
    • Boundary and Topographic Survey
    • Building Design Documents
    • Building Elevations
    • Building Floor Plan
    • Civil Plans for Residential Projects
    • Clearing and Grading CSWPPP Requirements
    • Comprehensive Plan Policy
    • Construction Design Documents
    • Deferred Submittal Guidelines
    • Design Guidelines
    • Easements Plan
    • Egress Lighting Requirements and Inspection
    • Fire Response Plan
    • Generator Permit Requirements
    • Landscape Plan
    • Lot Layout Plan
    • Mitigation Plan
    • Onsite Exterior Lighting Plan
    • Plat Map
    • Pool and Spa Plan
    • Preapplication Conference for Preliminary Plats and Planned Unit Developments
    • Preliminary Civil Plans
    • Preliminary Storm Drainage Report
    • Preliminary Traffic Plans
    • Project Proposal
    • Requirements for Recorded Documents
    • Residential Site Plan
    • Road Plan
    • Shoring Plan
    • Sign Permits - Building Review
    • Sign Permits - Plans and Drawings
    • Site Coordination Plan
    • Site and Infrastructure Design Documents
    • State Construction Stormwater General Permit
    • Storm Drainage Report
    • Stormwater Site Plan
    • Street Lighting Plan
    • Structural Plan Requirements
    • Structural or Lateral Calculations
    • Variance Criteria Letter

    For Commercial and Multi-Family Permits

    For commercial or multi-family project, the structural calculations should include gravity design and lateral design of the building. Gravity design includes structural design of roof and floor framing, bearing walls, columns and foundations. Lateral design must address both wind and seismic loads including design of the main lateral force resisting system, components and cladding, diaphragms and foundations. Buildings 5 stories or more are required to be designed by a licensed structural engineer.

    Modifications of existing buildings or structures often require engineering design. The International Existing Code (IEBC) specifies the structural requirements for buildings undergoing repairs, alterations, change of use, and additions. 

    Modifications of existing buildings or structures often require engineering design. The International Existing Code (IEBC) specifies the structural requirements for buildings undergoing repairs, alterations, change of use, and additions. 

    For Single-Family Permits

    Where a building of otherwise conventional construction contains structural elements exceeding the limits of the International Residential (IRC) Code section R301, or otherwise does not conform with the IRC, those elements must be designed in accordance with accepted engineering practice (IRC R301.1.3). Supporting structural calculations will be required for any such elements.  Common elements requiring engineering include (but are not limited to): retaining walls greater than 4ft in height from the bottom of the footing, basement walls, decks, beams and headers, roof or floor trusses and shear walls.  

     

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    For alternate formats, interpreters, or reasonable modification requests please phone at least 48 hours in advance 425-452-6800 (voice) or email servicefirst@bellevuewa.gov. For complaints regarding modifications, contact the City of Bellevue ADA, Title VI, and Equal Opportunity Officer at ADATitleVI@bellevuewa.gov.

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