Concrete Formwork

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Concrete Formwork Shoring Systems

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Table of Contents
Concrete Construction

• Vertical formwork systems (wall column systems)
• Horizontal shoring systems (flying systems
  stationary systems)
• Factors Affecting Formwork Shoring Designs

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Concrete Construction
Objectives Goals

• Develop an understanding of the current formwork
  shoring systems available today,
• Review typical applications and rental costs for
  each system,
• Learn the factors that govern formwork shoring
  designs decisions that contractors face,
• Be able to use this knowledge in evaluating
  formwork systems to fit the project.

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Factors Affecting Formwork System Selection

• Safety Accident Prevention!!
• Structure Type Design
• Floor to Floor Heights changes
• Column wall layout
• P/T slab or Conventionally reinforced
• Construction Joint locations
• Drop Caps, Slab breaks
• Existing constraints (Adjacent Buildings)
• Number of uses of form system
• Crane size location
• Schedule (Very Important)
• Manpower - Skill Level
• Productivity Cycling of equipment

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Factors Affecting Formwork System Selection

• Risk
• Formwork Supplier
• History with similar projects
• Engineering expertise
• Support services
• Knowledge of support personnel
• Location
• Buy vs. Rent
• Duration of project
• Future usage
• Return on investment
• Maintenance expense on owned equipment
• Storage expense

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Vertical Formwork Systems
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Vertical Formwork Systems
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Vertical Formwork SystemsWood Forming System
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Vertical Formwork SystemsHandset Forming System

• Application Walls Columns
• 50 more productive than
• snap tie wall systems
• Aluminum Frame with a 5/8
• plywood face
• Pour Pressures 1,200 psf
• Ties on 2 x 2 spacings
• Cost 0.85 to 1.00/sf per month

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Vertical Formwork Systems
Handset Forming System

• Panel widths vary from 1 to 30
• Panel heights 3, 4, 5, 6 8

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Vertical Formwork Systems
Hand-Set Forming System

• Quick Pre-assembly
• Moveable by Hand
• Hinges Carts Available
• Braced with 2 x 4s

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Vertical Formwork Systems
Crane Set Forming System
Power Plants
Commercial Building
Bridges
Tunnels
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Vertical Formwork Systems Crane-Set Forming
System

• Application Walls Columns
• Large Gang Wall Application
• Steel Frame with a 3/4
• plywood face Wt. 14 psf
• Pour Pressures 1,500 psf
• Ties on 4 x 4 spacing

• Cost 0.90 to 1.10/sf per month
• European Systems 1.45 to
• 1.65/sf per mo.

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Aluma Gang Wall Forms
Vertical Formwork System

• Form Design Aluma Beam with a
• 55 Kip Aluminum Strongback
• Plywood Face Typically 3/4
• Pour Pressures Up to 1520 psf
• Taper Ties on 6 x 6 Spacing

• Weight 10 Lbs per SF
• Cost 0.65 to 0.75/sf per month

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Aluma Gang Wall Forms
Vertical Formwork System

• Radius wall application

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Roll Back Jump Forms
Vertical Formwork System

• Problem
• Multi-lift Wall Construction
• Elevator Cores
• Safe Access for Rebar,
• Formwork Concrete
• Placing Operations

• Solution
• Rollback Jump Form

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Roll Back Jump Forms
Vertical Formwork System

• Standard Aluma Gang
• supported on Roll back Bracket
• Provides an 8 wide work deck

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Roll Back Jump Forms
Vertical Formwork System

• Form Rolls back 30 to allow
• access to rebar form Face.

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Roll Back Jump Forms
Vertical Formwork System
Standard Williams Type Insert
1 1/4 Landing Bolt support the Roll Back
Bracket
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Elevator Core Form
Vertical Formwork System

• Exterior Roll back panels Interior Cores are
  Crane Raised

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Horizontal Shoring Systems
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Hand-Set Shoring Systems Applications
Horizontal Shoring Systems
Horizontal Formwork for Cast in Place Concrete
Re-shoring
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Hand-Set Shoring Systems Applications
Horizontal Shoring Systems
Parking Garages
Truss Table Shoring
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Aluma Frame Shoring System
Horizontal Shoring Systems

• Hand-Set Shoring is rated by the capacity per leg
• 15 kips per leg
• Light weight 6 x 6 frame weighs 44 lbs.

• Cost Varies based on
• Slab thickness (controls beam spacings)
• Shore Heights (Frame stacks)
• H 10 0.35 to 0.45/sf
• H 10 to 15 Say 0.55/sf

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Aluma Frame Shoring System
Horizontal Shoring Systems

• Widest, Strongest Lightest shoring frame on the
  market
• 15 kips per leg
• Light weight 6 x 6 frame weighs 44 lbs.
• Frame Heights of 8 tall available

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Parking Garage
Horizontal Shoring Systems
Uses Aluma Beam Tables for Deck Support
Uses Aluma Frames to support the beams
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Parking Garage
Horizontal Shoring Systems
Step 1 Beam supports beam sides are
pre-assembled
Step 2 Deck Panels are Pre-Assembled
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Parking Garage
Horizontal Shoring Systems
Step 3 Set Shoring Frames in place then
add pre-assembled Beam Forms
Step 4 Set Pre-Assembled Beam panels
in place
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Parking Garage
Horizontal Shoring Systems
Inserts are added to Deck Panels to allow the
stripping of the beam sides and shoring
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Parking Garage
Horizontal Shoring Systems
Step 5 Cross braces are removed and the Aluma
Frame legs are folding up to facilitate strip and
moving
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Allows access to move system through set-up
equipment
Step 6 A forklift lowers the forms and
moves to the next pour
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Parking Garage
Horizontal Shoring Systems
Casters allow forms to easily move through project
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Parking Garage
Horizontal Shoring Systems
Questions?
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Aluma Deck
Horizontal Shoring Systems
Application Faster cycle times on flat slab
structures.
2 x 6 Aluminum Deck panels, shore points are on
a 6 x 8 grid

• Cost Varies based on
• Building Geometry (affects post spacing)
• Shore Heights
• Generally 1.10 to 1.25/sf per month

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Aluma Deck
Horizontal Shoring Systems

• Drop Heads for Stripping
• Deck removal one day after the pour and prior to
  post-tensioning
• Reduced cycle time
• Beam Hangers for column capitals

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Aluma Truss
Horizontal Shoring Systems
Application Used to speed construction on
multi-level building.
1st Floor shoring Trusses are supported on
hand-set Shore X Frames

• Cost Varies based on
• Slab thickness (controls beam spacings)
• Shore Heights (Truss configurations)
• Generally 0.55 to 0.65/sf per month

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Aluma Truss
Horizontal Shoring Systems

• 5 6 deep truss

• 7 10 crossbraces

• Extension legs Jacks
• 12 18
• 18 24
• 24 30

• Lowering devices

• Stripping flying

• Fillers

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Horizontal Shoring Systems
Column Hung
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Horizontal Shoring Systems
Column Hung

• Cost Varies based on
• Slab thickness (controls truss joist spacing)
• Column Spacing
• Generally 0.75 to 1.00/sf per month

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Horizontal Shoring Systems
Column Hung
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Horizontal Shoring Systems
Column Hung
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Horizontal Shoring Systems
Column Hung

• Column Hung Advantages
• No Reshoring
• Stock Floors before you
• fly tables to speed interior
• finishes
• Exterior can Follow closely

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Factors Affecting Formwork System Selection

• Safety Accident Prevention!!
• Structure Type Design
• Floor to Floor Heights changes
• Column wall layout
• P/T slab or Conventionally reinforced
• Construction Joint locations
• Drop Caps, Slab breaks
• Existing constraints (Adjacent Buildings)
• Number of uses of form system
• Crane size location
• Schedule (Very Important)
• Manpower - Skill Level
• Productivity Cycling of equipment

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Factors Affecting Formwork System Selection

• Risk
• Formwork Supplier
• History with similar projects
• Engineering expertise
• Support services
• Knowledge of support personnel
• Location
• Buy vs. Rent
• Duration of project
• Future usage
• Return on investment
• Maintenance expense on owned equipment
• Storage expense

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Horizontal Shoring Systems
Questions?
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