Project & Crew Information:

  • General Contractor: Brayman
  • Rebar Contractor: N/A (Self-Perform)
  • Union: Laborers Local 1058
  • Crew Size: 10-person
  • Shift Duration: 10-hour
  • Products Used: TyBOT
  • March 2019 – April 2019

TyBOT Performance Metrics:

  • Actual Ties: 111,645 (89% Total)
  • Active Production Hours: 99
  • Active Tie Rate: 1,128 Ties/HR
  • Total Equipment Hours: 120
  • Active Production Rate = 83%
  • Equipment Utilization Rate = 92%

ACR Project Scope:

  • 2 of 4-Span Bridge Deck
  • Bridge Deck SF: 26,445
  • Width:43’
  • Length:6 15’
  • Horizontal Deck Rebar: 269,000LBS
  • Total Deck Intersections: 125,250
  • Tie Specs: 50% Bottom / 100% Top

Budget w/o ACR Actuals w/ACR Increase / (Decrease)
Productivity (LB/MH) 175 263 50%
Customer Crew Manhours 1,528 1,013 -34%
Duration (Shifts) 19 13 -32%
Manpower (FTE) 10 10 0%

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Location:

  • Little Rock, Arkansas

Client:

  • D.T. Read

General Contractor:

  • Kiewit Corporation

Completion Date:

  • April 15, 2024

Deck Width (FT.):

  • 100

Bridge Deck Area (SQ. FT.):

  • 136,650

Deck Rebar (LBs):

  • 1,355,911

Total Ties:

  • 381,142

Tie Requirements:

  • 50% Bottom / 50% Top

IronBOT LBs Placed:

  • N/A

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TyBOT autonomous rebar tying robot on a bridge deck, viewed from the side