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>> Historical Renovations
Since 1995 CTS Engineering has been providing architects with structural engineering services to restore historical structures to their original vernacular while upgrading their structural systems to meet rehabilitation codes. Work with historical structures requires innovative engineering and construction techniques to increase lateral load and vertical load capacities while maintaining the integrity of the exterior elevations, floor to ceiling heights, and floor plans.
Project: Reynolds Building: Springville, Utah
Client: Horn & Partners Architecture

The three story unreinforced masonry (URM) structure was seismically retrofitted to meet collapse prevention criteria of ASCE/SEI 31-03. The use was changed from light manufacturing to office retail. The main new seismic for resistance system (SFRS) are composed of a four story braced frame, installed on two exterior wall lines, re-pointed URM walls without penetrations and new masonry shear walls make up the remaining SFRSs. The gravity load resisting system was also up graded to meet new building code loads.

Services: Structural Engineering
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Project: Spring City Historical School: Spring City, Utah
Client: Spring City Historical Society

The existing structure is a three level unreinforced masonry (URM) bearing wall structure with wood framed roof and floors. The project was completed in two phases, upgrade of the existing roof framing, and upgrade of the lateral load resisting system.

Roof reconstruction: Redesign of existing roof framing to upgrade the roof to existing code requirements for snow loads. The upgrade required to design framing members to fit within the existing framing, of the roof system.

Seismic renovation: Analysis of the existing structure was performed in accordance with FEMA 273/274 and ASCE/SEI 31-03 rehabilitation codes. This included analysis of seismic forces on the existing structure, examination of stress on existing elements, upgrade of connections between elements, upgrade of diaphragms and lateral load resisting shear walls.

Services: Structural Engineering
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Project: Healey Residence: Telluride, Colorado
Client: James Hardy Architects

Complete restoration of a one hundred twenty-five year old structure located in the historical district of Telluride Colorado. The entire roof structure and both floor level structures were removed. In the back of the structure the exterior walls and footings were removed, while maintaining the roof/deck structure over the garage. The roof elevation was raised to allow for restoration of the historical roof lines. New exposed heavy timber trusses were designed to distribute of the roof loads to the exterior walls, and eliminate the need for interior posts and transfer beams. Exterior walls were framed to integrate into the existing exterior main level walls without disturbing the original siding. Existing members in the sun room, seen below the exterior deck above, were reinforced to improve their load carrying ability.

Services: Structural Engineering
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