Please nominate reference drawings
Is structure a water retaining structure?
- S50 Pump Station
- S50 Piles
- N32 Mass concrete
- S40 Screen structure
- N32 Switch room building slab
- N15 Blinding
- S40 Other structures and slabs
Mix design and pour methodology approved by client? HP on ITP signed?
Is concrete tester booked?
Is concrete tester NATA accredited and approved by client?
Slump test - (test each batch prior to placing) requirement understood by tester?
If formwork requires design has design been approved by the contract administrator?
- Drawing dimensions confirmed
- Drawing dimensions not confirmed
HDPE / PVC liner on forms as required by drawings and secure? Confirm with photo
Controlled permeability formwork liner is on critical surfaces and secure? Confirm with photo.
Void formers in locations as required by drawings?
Void formers are secure and will not deflect during placing and compacting of concrete?
Holes have been provided in rebate formers etc to prevent air entrapment? Confirm with photo.
Formwork free of water, rust, dust, debris and stains?
Are all cores and embedded items are in place as per the requirements of the drawings and subsequent trades? Mark on drawings.
Are all cores and embedded items are accurately position and firmly supported?
Is there reinforcement cover to all cores and embedded items?
For slabs, confirm that fall on slab is correct?
Confirm predicted ambient temperature during ? If over 38 deg in the shade do not pour.
- 10-24 deg 2hrs
- 24-27 deg 1.5 hrs
- 27-30 deg 1hr
- 30-32 deg 0.75 hrs
- PS and screen structures 25 deg
- Unreinforced concrete in sections > 1 mt each dimension 27deg
- Concrete > 40 MPa in sections > 500mm 27deg
- All other concrete 32deg
Formwork temperature is less then 32 deg? Confirm with photo.
- Retention of formwork
- Ponding or continuous sprinkling with water
- Impermeable membrane ( light coloured)
- Absorbent cover kept wet with membrane covering
- Steam curing
- Approved curing compound
Confirm materials and equipement for curing are onsite ready to use?
Confirm curing time?
- Water retaining structure all surfaces - class 2
- Non Water retaining structure - all surfaces class 3
- Finishes as laid exposed surfaces - steel trowel
- Finishes as laid hidden surfaces wood float
25mm chamfers in place for all exposed edges?
Construction joints in location as per drawings? If no have the location been approved by the contract administrator
Construction joins are straight and true and free of blemishes?
Construction joints have been scabbled to not less the 5mm?
Confirm Water Stops installed as per drawings (Hydrotite CJ0725-3K on 50mm wide smooth surface)?
Control Joints locations confirmed?
Expansions joints located as per drawings? No fixed bars through joint? Joint filler installed as required?
- Sewer facing concrete - 75mm
- Ground facing concrete - 75 mm
- Soffit of roof slab (internal) - 70
- Top of roof slab (external) - 50
- Elsewhere - 50
- Bored piles - 100
- Underside of base slab - 100
- Top of base slab - 75
- Side of base slab - 60
- Liquid face of walls - 75
- External face of walls - 60
- Inside face of bypass channels - 50
- Inside face of precast walls - 50
- Outside of precast walls - 60
- Elsewhere - 50
ACRS cert available for reinforcement used?
Standard cogs and hooks supply as per AS3600? Ligs have hook of at least 135 deg?
There is one continious bar parallel to concrete edges unless otherwise noted?
Trimmer bars shown on drawings in place and secured?
N 12 trimmer bars by 1000mm at each layer at re-entrant corners openings and penetrations not shown on drawings?
Reinforcement bars are the correct size and spacing as per drawings?
Reinforcement supported at approx 800 mm centres with approved chairs, spacers or ligatures?
High strength fibre reinforced spacer blocks used for all structures with exposure classification B2 Greater ( i.e. All structures except the swithroom slab)?
Couplers and starters located in blockouts as required?
Reinforcement is electrically continuous?
Vertical reinforcement is lapped in locations as per drawings or as approved?
- N12 = 350
- N16 = 480
- N20 = 690
- N24 = 920
- N28 = 1180
- N32 = 1450
Horizontal reinforcement is lapped in locations as per drawings or as approved?
Confirm horizontal bar laps.
Confirm mesh overlaps by two wires by at least 25mm
Reinforcement not to be welded unless shown on drawings or approved by Contract Administrator. Has welding of reinforcement been approved?
Confirm no welds within bent sections (i.e. Within 75mm - N24, 100mm - N28 to N32, 125mm - N36)
Weld testing carried out i. Visual examination - 50% & Radiographic 5% fillet welds and 100% of butt welds
Has reinforcement been cut, bent or heated onsite?
Has approval been given by the contract adminstator to cut, bend or heat reinforcement onsite?
Dowel bars are smooth and Hot Dipped Galvinised?
Dowel bars correct size and located as per drawings? Dowels are supported so they will not move during the pour?
- Greg Grima
- John Toner
- Greg Oman
- Ian McCormick
- Peter Barsby
Name of Barwon Water representative