Question 1

Please expand on your experience with the different structural options for office and Residential as described in the concept package.

Design Build Enclosures

With our Turner Engineering Group (TEG), thorough technical and constructability reviews are integrated with design input from a deep bench of professionals to improve overall efficiency for project quality, performance, schedule, cost and overall design Intent.

Combining this extensive experience and insight with the need for speed-to-market for the Greyhound Block Development project, we believe there is tremendous value in Design-Build procurement for the exterior enclosure systems for both the residential and office towers.

We have assembled national resources to develop an expert Enclosure Team for your project. This team includes experienced Curtainwall professional engineers, and Curtainwall Designers who each have at least thirty (30) years exclusively in developing engineered curtainwall systems. In collaboration with the design team and the rest of Turner’s system component teams, our goal is to support the section of Exterior Wall systems that optimize the following criteria consistent with the design intent:

Performance
Schedule
Cost
Quality and Constructability

Our process carefully balances these goals to present the project team with Baseline Design and Optional Designs. To that end, our team is currently evaluating:

Turner's experience with over 1500 active projects every year globally, provides us with tremendous exposure, experience and insight into the various structural systems being used on marquee projects similar to the Greyhound Development. We have captured this valuable experience and lessons learned for the benefit of our clients resulting in an overall optimization of design and construction.

Base Scheme Unitized Curtainwall with unitization as shown on the drawings. Unitized curtainwall does meet the Greyhound Performance Criteria of a 15PSF wall.

Optional Scheme Unitized curtainwall in which successive narrow units are combined into a larger width Unit, which optimizes design and reduces the total # of Units to be erected.

Residential Tower

Our pricing is based on our Preliminary Engineered Solutions for each system, which means that our proposed Solutions meet all the Greyhound Performance Criteria and will meet the design aesthetic.

Stipulated Alternates

For the stipulated Alternates, as listed on the client’s pricing breakdown, both the option to provide Triple Glazing, in lieu of Double Glazing, and to provide an alternate for the TALON wall systems, will be presented at a later date. The option to incorporate Triple Glazing requires the aluminum framing system to change. This change requires the recalculation and re-engineering of framing including a widened aluminum glass pocket, and increased aluminum chassis dimensions. For the Window Wall systems, we are still researching the maximum width of an IGU that can be incorporated in them. It will be helpful to know the architect’s intended Triple Glass IGU width to expedite our analysis. Separately, the TALON wall capability to meet the project’s stipulated performance criteria and fire code compliance are currently under study.

Base Scheme 10 ft modules as shown on the drawings.

Optional Scheme 5 ft modules (which reduces the complexity of fabrication, delivery & erection but increases the overall # of Units that have to be erected).

Our Enclosure Team is already working on alternative engineering solutions for the 10 ft modules.

Office Tower

Cost and Schedule Considerations

Recognizing that “Schedule” is paramount, and a Critical Path Activity, we have selected unitized assemblies. For the purposes of this Proposal, our estimate is based upon Unitized Curtainwall for the Tower, and Residential curtainwall, Option #1. The rationale for a unitized curtainwall is multi-faceted, the most important being the sheer speed-of-erection, and schedule-enhancing qualities. Both systems meet the 15PSF performance criteria. As part of our due diligence, we have identified the multiple, highest quality unit Fabrication Plants through-out the USA at which these Greyhound units can be produced. This plan means that units can be fabricated simultaneously from several plants, assuring that these Units are delivered to meet the scheduled Erection Activity. Our plan incorporates storing Units, north of Denver, so that they are available in advance of the work-in the-field.

Design Build with Curtain Wall Trade Partners

In addition to our Turner Engineering Group for design support, we develop strategic partnerships with curtainwall subcontractors to complete the design-build team. With their participation, decisions regarding the selection of systems, especially related to availability and constructability, can be made concurrent with the design process saving time. Shop drawings and ideally fabrication drawings, can be developed in parallel with the final construction documents expediting fabrication. This not only provides significant benefits for the speed of project delivery but also reduces the need for rework by the design team.

Typically, these contractors are added to the team in a competitive qualifications-based selection process that includes and early guaranteed maximum price. This gives the client the benefit of early engagement with cost competitiveness. We also include an option to competitively bid these systems after preconstruction if in the best interest of the client and the project.