Main Residence Remodel & Addition (Phase I & II)

Project Details

This phased residential project involves the comprehensive remodel and expansion of an existing single-family residence. The scope is divided into two distinct stages: Phase I focuses on the primary interior remodel and demolition, while Phase II incorporates a new porte-cochere, a second-floor addition, and significant roofing upgrades. The project effectively increases the home’s living space from an existing 4,422 sq. ft. to a total of 5,933 sq. ft., which includes a 1,511 sq. ft. total addition and an additional 601 sq. ft. attic remodel. The structural design utilizes a combination of existing stem foundations and new concrete pier and grade beam systems to support the new additions. Architectural elevations detail a sophisticated exterior palette featuring textured cement plaster (stucco), copper gutters, and wood-framed windows. The roofing system is particularly diverse, integrating the existing concrete tile with new slate roofing and standing seam metal accents. Throughout the construction process, specific sections of the existing roof are designated to be maintained during the initial permit phase to ensure structural integrity and weather protection while new elements, such as the second-floor expansion and mechanical roof decks, are integrated.

Role

Structural Engineer/Designer

Services Provided

Phase 1:
The scope of services included the preparation of structural calculations and structural drawings for the proposed ground-floor addition, with the design accounting for loads associated with a future second-floor addition. Structural calculations included loading analyses for wind, seismic, snow (if applicable), dead, and live loads in accordance with the applicable building codes and project design criteria. The work encompassed the structural analysis and design of all required structural elements supporting the addition, including new foundations, shear walls, load-bearing walls, posts, headers, and collectors, roof support at tie-in points, holdowns, anchors, and connectors. The design also included diaphragm, chord, and collector continuity checks to ensure proper load transfer and structural compatibility where the new construction connected to the existing structure.
Structural drawings included the plans and details necessary for permitting and construction of the proposed addition. The drawing set consisted of a Foundation Plan identifying the layout and configuration of the new foundation system, a 1st Floor Shear Wall Layout Plan indicating the location and extent of the lateral force-resisting elements, and a Roof Framing Plan limited to the roof structure of the ground-floor addition or any required modifications to the existing roof to support the addition. Structural Building Section Views, including both longitudinal and cross-sections, were provided to illustrate the vertical relationships between structural elements and the tie-in conditions between the new and existing structures. The drawings also included typical structural details, general structural notes, and technical specifications necessary to clearly communicate the design intent and ensure proper implementation during construction.

Phase 2:
The scope of services included the preparation of structural calculations and structural drawings for the proposed second-floor addition in accordance with the applicable building codes and project design criteria. Structural calculations included loading analyses for wind, seismic, snow (if applicable), dead, and live loads to determine the governing design forces acting on the structure. The work encompassed the structural analysis and design of all required structural elements associated with the new second floor, including floor framing members, shear walls, posts or columns, beams and headers, stair stringers, guardrail posts, roof rafters or trusses above the new level, as well as all necessary holdowns, anchors, and structural connectors. The scope also included verification of load transfer to the strengthened first-floor walls and foundations, together with diaphragm, chord, and collector continuity checks to ensure that gravity and lateral loads were properly transferred throughout the structure.
Structural drawings included the plans and details necessary for permitting and construction of the second-floor addition. The drawing set included a 2nd Floor Framing Plan showing the layout and sizing of structural framing members, a 2nd Floor Shear Wall Layout Plan identifying the location and extent of lateral force-resisting elements, and a Roof Framing Plan illustrating the configuration of rafters or trusses above the new level. Structural Building Section Views, including both longitudinal and cross-sections, were provided to clearly illustrate the vertical load paths and the relationship between structural components forming the lateral and gravity systems. The drawings also included typical structural details, general structural notes, and technical specifications required to clearly communicate the design intent and ensure proper implementation during construction.