MASONRY
Material Calculator
AS 3700 compliant · Australian standards
📐Wall Dimensions
Wall Label (optional)
Length
m
Height
m
Waste
%
🧱Brick Size
Preset
🔲Bond Pattern
Pattern
⚗️Mortar
Mortar Class (AS 3700)
Joint Thickness
mm
Cement : Lime : Sand
📏Coursing & Opening Calculator
Desired Opening Width
mm
Desired Opening Height
mm
Width Options (to work full/half brick)
Height Options (to work full course)
📍Set-Out Running Dimensions
Wall Length
mm
Start from
Running marks — every full & half brick from start
🔩Lintels
Clear Opening Span
mm
Wall Type
Lintel Notes (AS 3700 / AS 2699.3)
Min. 3 courses of brickwork above lintel for composite action. Bearing: 100mm each end for spans < 1000mm, 150mm for spans ≥ 1000mm. Prop lintels during construction — props max 1.2m apart, remove only after mortar has cured. All lintels to be hot-dip galvanised to AS/NZS 4680 (R3 durability min.).
🪟Sills
Opening Width
mm
Sill Type
Sill Notes
Rowlock: Bricks laid on edge across sill, sloped outward min. 15° for drainage. Use Grade SW bricks for weather exposure. Install through-wall flashing under rowlock course with upturned end dams.
Slip sill: Fits within the masonry opening — length = opening width minus 10mm (5mm clearance each side). Requires drip groove on underside.
Lug sill: Extends into jamb brickwork each side (typically 50–65mm). Length = opening + 2 × lug. Set back from face for brick alignment.
Precast: One-piece concrete sill. Fewer joints = better waterproofing. Specify min. 15° slope, drip groove, and flashing beneath.
Slip sill: Fits within the masonry opening — length = opening width minus 10mm (5mm clearance each side). Requires drip groove on underside.
Lug sill: Extends into jamb brickwork each side (typically 50–65mm). Length = opening + 2 × lug. Set back from face for brick alignment.
Precast: One-piece concrete sill. Fewer joints = better waterproofing. Specify min. 15° slope, drip groove, and flashing beneath.
📐Wall Dimensions
Wall Label (optional)
Length
m
Height
m
Waste
%
🏗️Block Size
Preset
⚗️Mortar
Mortar Class (AS 3700)
Joint Thickness
mm
Cement : Lime : Sand
MAP: Face-shell bedded for hollow units. Fill perpends solid.
⚙️Reinforcement
Preset (AS 3700)
Vertical Bars
Bar Size
Centres
mm
Starter Lap
mm
Horizontal Bars
Bar Size
Centres (0 = none)
mm
Top Bond Beam
No. of Bars
🫧Core Fill
Grout Specification
Core Fill Grout Specification
📏Coursing & Opening Calculator
Desired Opening Width
mm
Desired Opening Height
mm
Width Options (to work full/half block)
Height Options (to work full course)
📍Set-Out Running Dimensions
Wall Length
mm
Start from
Running marks — every full & half block from start
🔩Lintels
Clear Opening Span
mm
Lintel Type
Block Lintel Notes
Steel angle: Bearing min 100mm (<1m span) or 150mm (≥1m span). Hot-dip galv to AS/NZS 4680, R3 min. Prop during construction.
Bond beam: Lintel block (knock-out web) filled with grout & reo. Min 2×N12 bars continuous, lapped 500mm past each jamb. Grout to core fill spec. Suitable for spans up to ~2.4m (engineer for larger).
Bond beam: Lintel block (knock-out web) filled with grout & reo. Min 2×N12 bars continuous, lapped 500mm past each jamb. Grout to core fill spec. Suitable for spans up to ~2.4m (engineer for larger).
📋Quick Reference
| Application | Slump | Strength | Agg. |
|---|---|---|---|
| Bed / perp joints | Plastic | Per class | — |
| Core fill (site) | 180mm | ≥20 MPa | 7mm |
| Core fill (AS 3700) | 200–250mm | ≥20 MPa | 10mm |
| Bond beam | 200–250mm | ≥20 MPa | 10mm |
| High-strength | 200mm | ≥25 MPa | 7mm |