Riser – Raker

Raker beams that support the precast risers can be designed using steel or precast concrete.  Gravity connections between the precast riser and raker assembly should be designed with field access in consideration.  Gravity connection shown allows access to connection via blockouts in riser and connection is completed from above risers.  Connections are typically designated to be fixed on one end and allow slip on the other end for seismic design.  After connection is completed, foam voids are placed over bolted connection and blockout is grouted solid from top of riser.

Riser – Riser

A riser to riser connection is located between the riser stem (vertical leg) and tread (horizontal leg).  Access to connection can be an issue as bottom side of risers are not always accessible to complete connection in field.  A grouted connection from the top side of risers is a preferred connection.  Structural bolts are installed by precaster extending up past the riser stem at consistent spacing.  Recesses are also installed in the riser tread to match bolt spacing.  Horseshoe shims are placed around structural bolts and used to set riser at correct elevation.  Once risers are set to final position, recesses are grouted from above to complete connection.

NMB – Column

NMB splice sleeves can be used in a variety of precast products that require a type 2 coupler. Rebar is constructed protruding from foundation and then cut to a specific distance above the foundation as required by size of NMB splice sleeve.  Female slice sleeve is embedded in precast and placed over protruding foundation rebar.  Once connection is complete at desired elevation, high strength mortar (that is provided solely by NMB manufacturer) is ejected into the sleeve via grouting tubes to complete connection.

Riser – Raker

Raker beams that support the precast risers can be designed using steel or precast concrete.  Gravity connections between the precast riser and raker assembly should be designed with field access in consideration.  Gravity connection shown allows access to connection via blockouts in riser and connection is completed from above risers.  Connections are typically designated to be fixed on one end and allow slip on the other end for seismic design.  After connection is completed, foam voids are placed over bolted connection and blockout is grouted solid from top of riser.

Riser – Riser

A riser to riser connection is located between the riser stem (vertical leg) and tread (horizontal leg).  Access to connection can be an issue as bottom side of risers are not always accessible to complete connection in field.  A grouted connection from the top side of risers is a preferred connection.  Structural bolts are installed by precaster extending up past the riser stem at consistent spacing.  Recesses are also installed in the riser tread to match bolt spacing.  Horseshoe shims are placed around structural bolts and used to set riser at correct elevation.  Once risers are set to final position, recesses are grouted from above to complete connection.

NMB – Column

NMB splice sleeves can be used in a variety of precast products that require a type 2 coupler. Rebar is constructed protruding from foundation and then cut to a specific distance above the foundation as required by size of NMB splice sleeve.  Female slice sleeve is embedded in precast and placed over protruding foundation rebar.  Once connection is complete at desired elevation, high strength mortar (that is provided solely by NMB manufacturer) is ejected into the sleeve via grouting tubes to complete connection.

Stadium/Arena Design

 

Speed of Construction

Stadiums and arenas are typically public projects needing a high level of scrutiny for maintaining the budget and schedule. Precast products designed and manufactured offsite parallel to substructure construction and delivered per schedule ready to be installed will reduce your overall project duration and cost. Offsite construction will also reduce the uncertainties of site labor impacted by environments and site obstructions and waste caused by site-forming materials.

Structural Performance
Precast/prestressed risers, rakers, columns, and vomitory walls have the capacity to span long distances while minimizing self-weight. The mass of concrete dampens vibration and enhances acoustical properties during live events. Longer spans and cantilevered conditions help bring seats closer to the action, reduce line-of-sight obstacles, and enhance the audience’s experience.

Quality of Product
Stadium and arena seating sections have larger rise/run treads that are difficult to form and produce onsite. Precast products are cast in controlled environments capable of producing higher-quality finishes.

 

 

3D Viewer

3D Viewer Tools and Functions:

  • 3D Viewer Functions:
  • Move, span, zoom assemblies
  • Isolate single components in view
  • Explode assembly single components
  • Use markup to sketch details
  • General measurements for concept
  • Print views

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