Stairs · plan · Free DWG block
Spiral Window Plan 3a
Here is a free spiral window plan 3a block, drawn as a clean staircase block ready for a floor plan and matching section or elevation. The linework is clean, closed and drawn to scale, so the block sits neatly in your file without bloating it. It is drawn in plan view, so it lines up with the rest of your drawing set and stays consistent from sheet to sheet. Placed in a layout it ties a plan and section together for vertical circulation, saving you from redrawing a spiral window plan 3a from scratch every time. Files are provided in DWG, ready to open in AutoCAD and most CAD software. It is one of the more popular blocks in our stairs library, free for personal and commercial use with no signup required.
Free for commercial use · no login
- Format
- DWG
- File size
- 65 KB
- AutoCAD
- 2004 and later
- Views
- plan
- Units
- Millimeters (mm)
- License
- Free · commercial OK
Where you’ll use it
In your drawings
The spiral window plan 3a block suits floor plans, sections, vertical circulation drawings and stair detail sheets. Because it ships with plan view, you can reuse the same block across the drawings that need it and keep your set consistent. Drop it onto a dedicated stairs layer so it stays easy to manage as your project grows.
Dimensions & scale
Sizing & units
Stairs are drawn to typical going and riser conventions; check the run and headroom against your floor-to-floor height. The block is drawn at 1:1 in millimeters, so insert it at scale 1 and adjust only if your drawing uses different units.
How to insert in AutoCAD
Using the Spiral Window Plan 3a block
Download the DWG file and open it in AutoCAD (2004 or later) or any DWG-compatible CAD app. Use the INSERT command — or simply copy and paste — to place the spiral window plan 3a into your drawing, then position, rotate and mirror it to suit your layout. Keep your drawing units set to millimeters and insert at scale 1 so it matches real-world size. Move it onto a dedicated stairs layer to keep your file tidy.
Questions
Frequently asked
Is the spiral window plan 3a CAD block free for commercial use?+
Yes. The spiral window plan 3a block is free to download and use in both personal and commercial projects on CADBlockDWG, with no attribution required and no signup.
What file formats does the spiral window plan 3a download include?+
This staircase block is available in DWG. DWG opens directly in AutoCAD and most CAD software; you can export to DXF from AutoCAD if you need a more portable exchange format.
Which views and dimensions does the spiral window plan 3a include?+
It is supplied with plan view, drawn to scale so the block lines up across your drawing set.
Is this a 2D or 3D staircase block?+
It is a 2D block intended for floor plans and similar drawings. It is drawn at 1:1 in millimeters, so it reads at true scale once inserted.
How do I insert the spiral window plan 3a into AutoCAD?+
Download the DWG file, open it in AutoCAD 2004 or later, and use the INSERT command (or copy and paste) to drop it into your drawing. With units set to millimeters, insert at scale 1, then rotate, mirror and re-layer it to match your stairs layout.
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