CADRE DESIGN GROUP, INC.

Services

3-D Modeling

Bridge Design

Highway Design

Railway Design

Construction Services

Bridge Design

Cadre specializes in structural design, detailing, plan preparation and quantity takeoffs for a variety of bridge types. Our experience allows us to begin detailing with minimal information from our clients, such as a General Plan. We have worked with Caltrans, local agencies, Rail Transit agencies, DOT's and contractors.

Cadre has extensive knowledge of Caltrans structures and standards. We have prepared Flat Slab, Box Girder, I-Girder, and Steel Girder bridges and Bridge Widenings incorporating client standards. We have detailed Steel Through Girder, Prestressed Box Beam and Steel Plate Girder bridges for several railroad companies incorporating unique standards and CADD requirements.

Cadre has unique experience working on several high profile projects across the country. We have prepared plans for Precast Post-Tensioned Segmental bridges and Cablestayed bridges. We have prepared Shop Drawings for several contractors on a variety of bridge types and construction methods, from Segmental Balanced Cantilever and Span-By-Span in Las Vegas to an Inverted Fin Girder in Japan.

Cadre can assist you in all phases of a project from preliminary design efforts (by preparing "Advanced Planning Studies" or "Type Selection") to helping you out of a deadline crunch.

Flat Slab

Cadre has designed and detailed several Concrete Slab Bridges. Our experience enables us to begin detailing and designing, from Caltrans manuals, with minimal direction from our clients. This ability provides our clients flexibility with schedule and budget issues. Selected projects are:

Pleasants Valley Road Bridge over Encinosa Creek - This project included 3 bridges varying in width and length. These bridges were prepared for Solano County replacing existing narrow structures. Stage construction was required to keep traffic open throughout construction.

Foothill Drive Bridge over Encinosa Creek - This 16 meter long and 11 meters wide bridge was prepared for Solano County replacing an existing narrow culvert. Stage construction was needed to keep traffic open throughout construction.
Arroyo Canal Bridge on Fairfax Avenue - This 68'-0" long and 32'-0" wide bridge was prepared for Fresno County replacing an existing narrow culvert. This bridge replacement raised the existing profile to allow for a higher flood stage.

Steel Girder

Cadre has detailed several Steel Plate Girder, Through Girder and Steel Box Girder bridges. Our unique experience detailing both new and retrofitted steel structures provides our clients the flexibility needed in today's engineering environment. Selected projects are:

I-88O Reconstruction Project - This project replaced the old double deck Cypress bridge that collapsed in the 1989 Loma-Prieta earthquake. This East Bay Viaduct-Off Ramp has 10 spans with variable widths crossing over existing railroad tracks. It was completed for Caltrans District 4.

East Issaquah Creek Crossing - This 150 meter long and 12 meter wide Steel Box Girder bridge spans an environmentally sensitive area of Issaquah Creek. Cadre was responsible for detailing plans for PS&E submittal adhering to WashDOT standards.

5400 South Railroad Crossing - This new Steel Through Girder bridge was built parallel to the existing structure which allowed double tracking of an existing alignment. Cadre was responsible for detailing plans for PS&E submittal adhering to UDOT standards.

Bridge Widenings

Cadre has extensive experience detailing widenings for a variety of structures. We have detailed widenings for concrete slabs, box girders, prestressed concrete girders and deck overhangs. These projects are located throughout the state and were designed for numerous agencies. Selected projects are:

Jefferson Street UC - This project widens an existing Steel Plate Girder bridge by 7 meters using Prestressed Concrete I-Girders. New approach slabs and retaining walls were required. Cadre detailed plans for the Riverside County Transportation Commission following Caltrans standards.

Mountain View Overhead - This project connects two existing Prestressed Concrete Girder bridges using both CIP Reinforced Box Girder and Prestressed Concrete Girders. This widening also included retrofit of existing structures. Cadre detailed plans for Santa Clara County following Caltrans standards.

San Gabriel River Bridge - This project widens an existing Concrete Girder bridge by 22 feet on both sides using Reinforced Concrete T-Beams. This widening also included retrofit of existing structures and an addition of a soundwall. Cadre detailed plans for Los Angeles County following Caltrans standards.

Box Girder

Cadre has detailed over 50 CIP Reinforced, CIP Prestressed Box Girders, Prestressed Box Beams and I-Girders bridges. Our experience enables us to begin detailing with minimal direction from our clients. This ability provides our clients flexibility with schedule and budget issues. Selected projects are:

American River Bridge at Lake Natoma - This project included 2 bridges with the longest being 690 meters. The main spans are variable depth, 100 meters long with decorative arches. Cadre helped prepare over 300 bridge and roadway plans for the city of Folsom.

I-88O Reconstruction Project - This project replaced the old double deck Cypress bridge that collapsed in the 1989 Loma-Prieta earthquake. This fast track project included several CIP Prestressed Box Girder bridges and Steel Girder frames over existing railroads. It was completed for Caltrans District 4 using their standards.

Arroyo Canal Bridge on Fairfax Avenue - This 68'-0" long and 32'-0" wide bridge was prepared for Fresno County replacing an existing narrow culvert. This bridge replacement raised the existing profile to allow for a higher flood stage.

Segmental

Cadre has unique detailing experience in the design of Precast Post-Tensioned Segmental bridges. We have experience with cantilever and span-by-span construction methods. We have detailed post-tensioning layouts, anchorage hardware, anchor/deviation blocks, abutment segments and pier segments for both PS&E and construction services. Selected projects are:

Hanging Lake Viaduct - This crossing of the Colorado River consists of dual 300 ft. spans. Segments are 33' wide and vary from a depth of 12 ft. at the pier to 10 ft. at midspan. This project consists of 1200 segments in 40 spans. It was completed without disturbing traffic in an environmentally sensitive area and completed 10 years of construction through this spectacular canyon.

H.O.V. Connector Viaduct (55/5) - This connection of two major freeways in Orange County was completed in 1997 for Caltrans. This Segmental alternative consists of 27 spans with over 370 segments. This unique bridge combines segmental with a CIP Prestressed Concrete Box Girder frame and Outrigger Bents.
I-15/U.S. 95 "Spaghetti Bowl" Reconstruction Project - This project has five new major ramp structures being built in the I-15/US 95 Interchange reconstruction. Four of the five major ramp structures on this project are of precast concrete segment construction. This type of construction was selected because it can be built quickly with a minimum of impact on existing traffic compared to other types of construction.

Cablestayed

Cadre has unique detailing experience in the design of Concrete Segmental Cable-Stayed bridges. Not widely built in the United States, Cadre is proud to be involved with preliminary design and final PS&E detailing of several structures. Selected projects are:

Chesapeake and Delaware Canal Bridge - The C&D Canal Bridge is the first major concrete segmental cable-stayed bridge structure to be completed in the Northeast where it holds the record for the longest concrete span at 230 m (750 feet). The 1,390 m (4,560 feet) long bridge is a precast segmental structure with twin parallel box girders that provide six lanes of travel to a highly congested corridor.

Clark Bridge-Alton, Illinois - The new bridge will span 4,260 feet across the Mississippi at Alton, IL, replacing the current 65 year old bridge. The river averages 40 feet deep at the center of the channel. Construction on the bridge began in June of 1990.

Roosevelt Bridge, Roosevelt Reservoir - Concrete segmental cable-stayed alternative. The $21.3 million bridge was built to take traffic off the top of Roosevelt Dam. Roosevelt Lake Bridge spans 1,080 feet across Roosevelt Lake providing two-way traffic. The original dam-top roadway was designed to allow two Model-T Fords to pass abreast, but today's recreational vehicles and full-size automobiles are too wide to permit two-way traffic.

Shop Drawings

Cadre has assisted on several construction projects providing shop drawings, rebar cut sheets and quantities. We have also assisted in three design/build projects. Selected projects are:

Hanging Lake Viaduct- This crossing of the Colorado River consists of dual 300 ft. spans. Segments are 33' wide and vary from a depth of 12 ft. at the pier to 10 ft. at midspan. This project consists of 1200 segments in 40 spans. It was completed without disturbing traffics in an environmentally sensitive area and completed 10 years of construction through this spectacular canyon.

I-15/U.S. 95 "Spaghetti Bowl" Reconstruction Project- This project has five new major ramp structures being built in the I-15/U.S. 95 Interchange reconstruction. Four of the five major ramp structures on this project are of precast concrete segment construction. This type of construction was selected because it can be built quickly with a minimum of impact on existing traffic compared to other types of construction.

Eastern Transportation Corridor- This Design/Build project included over 30 CIP Prestressed Box Girder bridges. Cadre worked closely with the contractor detailing bridge plans, rebar fabrication and estimating quantities. These bridges were prepared for Transportation Corridor Agencies in Orange County.