What is a blockwork hatch?

A blockwork hatch represents concrete masonry units in plan, section or elevation. It uses the same coursed logic as brick but at a larger module, typically 400 x 200 mm metric or 16 x 8 in imperial.

How do I import a blockwork PAT file into AutoCAD?

Copy the .PAT file into a support path, run HATCH, choose Custom and select the pattern by name. Leave the hatch scale at 1 so the block module measures true.

Can I use this blockwork hatch in Revit?

Yes. Import it as a Model fill pattern with import scale 1 and apply it to the wall material, so the coursing stays anchored to the geometry.

Can I change the block size?

Yes. Enter any block width and height. The joints and coursing rebuild around the module you set, so specials and thin block formats work the same way.

Blockwork Hatch Generator

Create a concrete masonry unit pattern at real block dimensions and export it as a .PAT file.

Free

Material library

Choose a common building material as a starting point.

Blockwork loaded. Adjust any parameter below.

Pattern parameters

These values are written into the PAT file.

Pattern name

Generated automatically from the pattern type and dimensions.

Units

Pattern size

Module of the material symbol. Scales the whole hatch.

Rotation

deg

Scale

Multiplies every exported distance in the PAT definition.

Live preview

2,400 mm wide

PAT definition

blockwork_400.pat

;; Generated with ArchSupply Utilities - Hatch Pattern Generator;; Drawing units: millimetres (metric pattern);; Load in AutoCAD with HATCH > Custom, or in Revit via Manage > Additional Settings > Fill Patterns.*BLOCKWORK_400, Blockwork: running bond blocks, 400 mm long0, 0,0, 0,20090, 0,0, 200,200, 200, -2000, 0,100, 0,200, 160, -40

PAT definition ready

PAT output is in beta. Verify the pattern scale after importing into your CAD or BIM application.

About the blockwork hatch

Concrete blockwork is drawn with a much larger module than brick, and the difference in module is exactly how a reader tells the two apart on a wall section. A 400 x 200 mm block reads immediately as CMU rather than facing brick.

This generator produces coursed blockwork with continuous bed joints and regular head joints. Use running bond for standard walls or switch to a stacked arrangement where the specification calls for aligned joints.

Because the pattern is built at true size it stays correct when a wall is drawn at 1:20 or 1:50, and it can be reused as a Revit model pattern so blocks track the wall rather than the view.

How to use the PAT file

Download the .PAT file, or copy the definition into your own pattern library file.
AutoCAD: place the file in a support path, then choose Hatch, Pattern type Custom and pick the pattern name.
Revit: Manage, Additional Settings, Fill Patterns, New, Custom, then import the .PAT file and set the import scale.
Metric patterns assume millimetre drawing units; imperial patterns assume inches.

Frequently asked questions

What is a blockwork hatch?: A blockwork hatch represents concrete masonry units in plan, section or elevation. It uses the same coursed logic as brick but at a larger module, typically 400 x 200 mm metric or 16 x 8 in imperial.
How do I import a blockwork PAT file into AutoCAD?: Copy the .PAT file into a support path, run HATCH, choose Custom and select the pattern by name. Leave the hatch scale at 1 so the block module measures true.
Can I use this blockwork hatch in Revit?: Yes. Import it as a Model fill pattern with import scale 1 and apply it to the wall material, so the coursing stays anchored to the geometry.
Can I change the block size?: Yes. Enter any block width and height. The joints and coursing rebuild around the module you set, so specials and thin block formats work the same way.

Related materials

Every material opens the same generator with its pattern preloaded.