Primary mixed-use steel frame
Approximately 912 tons of structural and miscellaneous steel were modeled across the basement and three above-grade floors.
LocationJackson, Wyoming
Client / FabricatorAllied Steel
Structural and miscellaneous steel tonnage912 tons
Building areaApproximately 68,000 sq. ft.
Delivery methodDesign-assist
Project overview
912 tons coordinated across changing elevations and multiple building uses.
Cache & Pearl is a three-story, approximately 68,000-square-foot mixed-use development located at the intersection of Cache Street and East Pearl Avenue in downtown Jackson.
The building combines 18 residential units with ground-floor retail, covered parking, resident amenities, a basement, and rooftop spaces. Working with Allied Steel, our team fully modeled and detailed approximately 912 tons of structural and miscellaneous steel using Tekla Structures.
The building extends across a basement and three above-grade floors. Its program includes more than 10,000 square feet of retail space, residential units, a 58-space covered parking garage, a resident gym and storage areas, a rooftop deck, pool, and spa.
The combination of commercial, residential, parking, and amenity spaces created varied framing conditions throughout the structure.
Project team and technical details
- Developer
- Crystal Creek Capital
- Structural Engineer
- DCI Engineers
- Architect
- Northworks Architects and Planners
- General Contractor
- Dick Anderson Construction
- Steel Erector
- Intermountain Erectors Inc.
- Detailing platform
- Tekla Structures
- Market
- Mixed-Use / Residential / Retail
Detailing scope
Structural steel detailing scope.
Seismic and special connections
The scope included HSS bracing, yield gusset plates, seismic moment welds, special braced frames and connections incorporating thermal break bearing pads.
Design-assist light structural steel
Developing light steel conditions were reviewed with the engineer and architect through the Tekla model and regular model exports.
Six stair towers
Six steel stair towers included landings and railings, together with a separate two-flight stair and gate.
Deck and elevator coordination
Steel interfaces were coordinated with deck elevations, elevator components and suppliers, stairs and architectural requirements.
Shop and erection drawings
The coordinated Tekla model provided the basis for fabrication and erection information across the primary framing and miscellaneous steel.
Technical complexity
Coordination and detailing challenges.
Multiple slab elevations
Changing floor levels affected beams, deck, elevator framing, stair landings and their connections throughout the building.
Seismic connection interfaces
Gusset plates, weld requirements and architectural clearances had to remain compatible with the overall Seismic Force-Resisting System.
Stair towers through changing levels
Stair geometry had to align with floor framing, openings, landing supports, adjacent finishes and access requirements.
Developing steel and supplier information
The design-assist scope and deck and elevator interfaces required continued review against the complete structure before fabrication information was finalized.
Our approach
Advanced seismic connections developed for fabrication.
The project included several complex connection types associated with the building’s seismic design and lateral force-resisting systems.
Connection detailing included:
- HSS bracing connections
- Yield gusset plates
- Moment-welded connections designed to meet seismic requirements
- Special braced frame connections
- Connections forming part of the Seismic Force-Resisting System
- Connections incorporating thermal break bearing pads
- Special structural connections developed for project-specific conditions
These connections required careful coordination between member geometry, gusset plates, weld requirements, architectural interfaces, and the overall seismic system.
Design-assist development of light structural steel.
Light structural steel was developed through a design-assist process. This required the detailing team to coordinate developing design information with the primary structure and other building components.
The Tekla model and model exports supported communication with DCI Engineers and Northworks Architects and Planners as the design-assist scope progressed.
This workflow allowed developing conditions to be reviewed within the context of the complete structure before fabrication information was finalized.
Six stair towers coordinated through changing floor levels.
The miscellaneous steel scope included six steel stair towers, each incorporating landings and stair railings. The project also included a separate two-flight stair with a gate.
The stairs had to be coordinated with:
- Varying slab elevations
- Structural floor framing
- Architectural openings
- Landing support conditions
- Guardrails and handrails
- Adjacent walls and finishes
- Erection and access requirements
Modeling the complete stair assemblies in Tekla Structures allowed their geometry and connections to be coordinated with the primary building frame.
Coordination with deck, elevator, and building systems.
Extensive interdisciplinary coordination was required throughout the project. The detailing team worked with deck and elevator suppliers while also coordinating structural conditions with the architect and engineers.
Particular attention was given to interfaces between the steel framing, deck elevations, elevator components, stairs, and seismic connections.
The coordinated model helped identify conflicts, manage complex interfaces, and support constructability across both structural and miscellaneous steel scopes.
Project animation
Explore the project in motion.
Project result
From coordinated model to fabrication-ready information.
The complete steel package was modeled and detailed in Tekla Structures. The model served as the basis for structural coordination, connection detailing, model exports, and the production of shop and erection drawings.
By maintaining the primary framing, seismic connections, stairs, railings, and design-assist steel within one coordinated environment, the team developed consistent fabrication information across the project’s diverse structural conditions.