Formwork Finish Classes (Concrete) Building Codes & Rules

Straight Edge (a - b)

10 to 15m^{AS 3610.1:2018, 3.3.5.2}

1.25m^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

300^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

10m^{AS 3610.1:2018, 3.3.5.2 (c)}

5m^{AS 3610.1:2018, 3.3.5.2 (c)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}

10m^{AS 3610.1:2018, 3.3.5.2 (c)}

≥ 2m^{AS 3610.1:2018, 3.3.3.2}

1.25m^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

1.25m^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

Straightedge

b^{AS 3610.1:2018, Figure 3.3.5.2 (A)}

Out of Plumb - Rectangular Column^{AS 3610.1:2018, 3.3.5.2 (d)}

• 300mm plumb vertical distance from top & bottom surface
• ≥ 2 readings on adjacent faces

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}

s^{AS 3610.1:2018, Figure 3.3.5.2 (B)}

1.25m^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

Concealed Cupboard

a^{AS 3610.1:2018, Figure 3.3.5.2 (A)}

Straightedge

≥ 300^{AS 3610.1:2018, 3.3.4.2}

300^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

Component Length

1.25m^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

Ceiling Soffit

Uniform Tie Rod Hole Pattern

Face Step^{AS 3610.1:2018, 3.3.5.2 (b)}

• ≥ 200mm straightedge intervals over whole visible step
• "s" tolerable gap between straightedge & finished concrete

Tolerable gap^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 5mm 95% surface reading
• ≤ 7mm 100% surface reading

Out of Plumb - Circular Column^{AS 3610.1:2018, 3.3.5.2 (d)}

• 300mm plumb vertical distance from top & bottom surface
• At 90° angles from each other

Flatness (Grid)^{AS 3610.1:2018, 3.3.5.2 (c)}

• Patterned Surface
• 1.25m x 1.25m grid pattern
• 300mm clearance on plane's edge

d

≥ 1.5m^{AS 3610.1:2018, 3.3.5.2 (a)}

Tolerance Gap

≥ 3m to < 8m Ht.^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 6mm 95% surface reading
• ≤ 8mm 100% surface reading

Tolerance Gap

< 3m Ht.^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 3mm 95% surface reading
• ≤ 5mm 100% surface reading

a^{AS 3610.1:2018, Figure 3.3.5.2 (A)}

≥ 300^{AS 3610.1:2018, 3.3.5.2 (a)}

Straight Edge (a - b)

Tolerance Gap^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 2mm 95% surface reading
• ≤ 4mm 100% surface reading

Class 1 Formwork Finish Fact Sheet^{AS 3610.1:2018, 3.2.3}

≥ 2m^{AS 3610.1:2018, 3.3.3.2}

≥ 2m^{AS 3610.1:2018, 3.3.3.2}

Blowholes Imperfection^{AS 3610.1:2018, 3.3.3.2 (a)}

• Small holes on the surface
• ≥ 2m viewing distance
• 1:1 scale photo comparison for blowholes evaluation to AS 3610.1

Tolerable gap^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 4mm 95% surface reading
• ≤ 5mm 100% surface reading

≤ 2mm or Span/360^{AS 3610.1:2018, 3.3.4.1}

Form Face Deflection^{AS 3610.1:2018, 3.3.4.2}

• ≥ 10 readings at ≥ 300mm intervals in the same direction of the span
• "d", tolerable distance between straightedge & finished concrete

Tolerance Gap^{AS 3610.1:2018, Table 3.3.5.1}

• Within Element
• ≤ 1mm 95% surface reading
• ≤ 2mm 100% surface reading
• On Construction Joints
• ≤ 2mm 95% surface reading
• ≤ 3mm 100% surface reading

≥ 200^{AS 3610.1:2018, Figure 3.3.5.2 (B)}

s^{AS 3610.1:2018, Figure 3.3.5.2 (B)}

Surface Undulations^{AS 3610.1:2018, 3.3.5.2 (a)}

• 300mm & 1.5m Straightedges
• ≥ 30 readings of elements with ≥ 2m in either direction
• ( a - b ) reading evaluation

Tolerance Gap^{AS 3610.1:2018, Table 3.3.5.1}

• ≤ 1mm 95% surface reading
• ≤ 2mm 100% surface reading

b^{AS 3610.1:2018, Figure 3.3.5.2 (A)}

Out of Plumb - Wall^{AS 3610.1:2018, 3.3.5.2 (d)}

• 300mm plumb vertical distance from top & bottom surface
• ≥ 2 readings at ≤ 5m CTS wall length

≤ 5m^{AS 3610.1:2018, 3.3.5.2 (d)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}

Flatness^{AS 3610.1:2018, 3.3.5.2 (c)}

• Non-pattern Surfaces
• 10m w/ overlapping 5m reading along straight line
• "f" tolerable gap between string line & finished concrete

10m^{AS 3610.1:2018, 3.3.5.2 (c)}

10m^{AS 3610.1:2018, 3.3.5.2 (c)}

5m^{AS 3610.1:2018, 3.3.5.2 (c)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

300^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

300^{AS 3610.1:2018, Figure 3.3.5.2 (D)}

f^{AS 3610.1:2018, Figure 3.3.5.2 (C)}

300^{AS 3610.1:2018, 3.3.5.2 (d)}