DSS Row 25 Shuttle Beam and Runway Beam

DSS Row 25 Shuttle Beam and Runway Beam Comments William Miller University of Minnesota 13, January 2021 Phase 2 DSS support structure at Ash River 1 13 January 2021 DSS Runway and Shuttle Beams

Row 25 holding its proper position in warm After the shuttle beam trolleys and runway beams have been removed the ground planes can be installed, field cages deployed, and the End Wall constructed and slide into place 2 13 January 2021 DSS Runway and Shuttle Beams

Removing Runway Beams Installation steps • Outside APA must be in final position, cabled and fully tested • CPA must be in final position and fully tested • Shuttle beam is bolted to “runway beam stub” • Shuttle beam trolleys are now removed • Downstream Runway beam is now removed, it can not come straight down must be moved to the south then rotated to clear Field Cages and cable trays 3 13 January 2021 DSS Runway and Shuttle Beams

Shuttle beam trolly design This was an issue that came up at Ash River. Best design practices to minimize shuttle beam racking is the distance between the wheels and cam followers should be a minimum of 4 times the width of the beam (~24”). An additional *” was added to the “Runway Beam Stub” past outside DSS beam 4 13 January 2021 DSS Runway and Shuttle Beams