Professional CAD in your browser
Review Niroobini Technologies’
privacy policy
and
terms of service
to understand how Niroobini Technologies will process and protect your data.
To make changes at any time, go to your
Google Account.
Learn more about
Sign in with Google.
New to NirtsCAD? User manual
I’m your CAD assistant—describe geometry in plain language and I’ll help turn it into drawing actions.
Try asking:
Unlock unlimited drawing, file save/export, and all CAD tools.
Secure payment via Razorpay. Cancel anytime.
Subscribe to NirtsCAD Basic to continue drawing, saving, and exporting your work.
To use the AI assistant, you need a Gemini API key (free for low usage).
Developed by
NIROOBINI TECHNOLOGIES (OPC) PRIVATE LIMITED / CHENNAI / INDIA
| Visible | Frozen | Current | Layer Name |
|---|
Only BEAM lines with both endpoints between these levels are included. COLUMN lines are not filtered by Z. Leave a field blank for no limit on that side.
Only 3DFACE entities with CADMAX:SLAB XData are used. All slab corners must lie between lower and upper Z. Leave a field blank for no limit on that side.
Same reinforcement limits as SLAB (SLABINPUT). Then select CADMAX:SLAB 3DFACE entities.
Concrete fck and steel fy come from the CADMAX panel Materials (not entered here).
Base elevation is kept; tip Z is moved to base + height.
Select a sloped 3DFACE with CADMAX:SLAB XData. H run and V rise follow the same edge rule as AutoCAD STAIRD (corner1–2 or 2–3). Then pick where to draw the detail.