2015 structures congress - 2 day cycle
Post on 30-Jul-2015
188 Views
Preview:
TRANSCRIPT
Coordination and Communication in a 2-Day Cycle
Ramon Gilsanz, PEJennifer Lan, PE
ASCE Structures Congress 2015
• 32 Story Tower, 14 Story Mid-rise• 55 Apartments per Floor• 400-2500 sq. ft. per apartment• 575 feet in length
ProjectNew York, NY
ASCE Structures Congress 2015
• 588,000 square feet floor area• 67,000 square feet site footprint• 8” Flat Plate Slab• 5 “Core” Shear Walls, 2 Straight Walls
ProjectNew York, NY
ASCE Structures Congress 2015
• First documented in NYC in the 1950s
• Improved upon over time (shoring techniques, concrete mix)
• Requires competent, experienced, and specialized work force
2-Day Cycle
ASCE Structures Congress 2015
ASCE Structures Congress 2015
Day 1, PM
• Lift lumber, plywood, shoring• Begin formwork• Complete pour
ASCE Structures Congress 2015
Day 1, End of Day
• Formwork erection done• Column/wall rebar work starts
ASCE Structures Congress 2015
Day 2, AM
• Place block-outs• Place Bot. Rebar• Lay Conduits• Top bars start by mid-day
ASCE Structures Congress 2015
Day 2, PM
• Place Concrete at Columns and Shear Walls• Continue Setting Rebar
150 people x $900 per day per person
= $135,000 per day
Why the2-Day Cycle?
ASCE Structures Congress 2015
• Electrical
• Penetrations aroundcolumns / walls
• Construction Equipment
Field Coordination
ASCE Structures Congress 2015
• All communication between the Contractor and the Design team will be through Architect.
• No decisions or issues that have an impact on design scope, cost or schedule shall be made by a consultant.
• Once a consultant has reviewed a submittal, it shall be submitted to the architect who will consolidate comments prior to issuance of the contractor.
• RFI Responses and any accompanying information shall be issued to the Architect only. Do not broadcast a response to the Contractor/Owner unless previously agreed upon with the Architect.
Standard Communication Chain
ASCE Structures Congress 2015
Architect
GC
Inspector
Engineer
RFIASI
RFIASI
Reports
Scheduling Punch List
RebarConcrete
Sub
Standard Communication Chain
ASCE Structures Congress 2015
• What is the appropriate RFI response time for field conditions?– Instant?– Hours?– Days?
Scheduling for a 2-Day Cycle
ASCE Structures Congress 2015
150 people x $900 per day per person
= $135,000 per day
ASCE Structures Congress 2015
Scheduling for a 2-Day Cycle
• Contractor is immediately aware of what is needed– Pre-Construction Meetings– Shop Drawing Review
• Inspectors have access to engineers
• Good record keeping (daily, electronic reports)
Communication
ASCE Structures Congress 2015
top related