Using splines to draw the profile of corrugate metal roofing

Use this forum to ask questions about how to do things in QCAD.

Moderator: andrew

Forum rules

Always indicate your operating system and QCAD version.

Attach drawing files and screenshots.

Post one question per topic.

Post Reply
nigelblake
Registered Member
Posts: 2
Joined: Wed Sep 26, 2012 4:16 pm

Using splines to draw the profile of corrugate metal roofing

Post by nigelblake » Wed Sep 26, 2012 6:04 pm

I am using QCAD 3.0 to design a simple outbuilding with a corrugated metal roof. I think one of the spline tools would be the best way to draw the profile of the corrugated roofing material. Here are the dimensions: 76.2 mm is the horizontal distance between the peak of each corrugation. The vertical distance from the trough to the peak is 19mm; the width of each sheet is 1104.9mm. The profile has a simple sinusoidal character. Can you suggest the best way I might do this? Thanks in advance for your help.

User avatar
Clive
Moderator
Posts: 1329
Joined: Thu Aug 25, 2011 9:28 pm
Location: UK

Re: Using splines to draw the profile of corrugate metal roo

Post by Clive » Wed Sep 26, 2012 6:44 pm

Welcome nigelblake to the forum
I see you have ' double-posted', here and also in the 'QCAD Community 'How Do I' Questions' forum!
Are you using QCAD community Edition 2 or QCAD pro 3?

User avatar
Clive
Moderator
Posts: 1329
Joined: Thu Aug 25, 2011 9:28 pm
Location: UK

Re: Using splines to draw the profile of corrugate metal roo

Post by Clive » Wed Sep 26, 2012 7:57 pm

Based on QCAD 3, one way of doing this is:
1. Set up layers - construction (color e.g. magenta)
point (color e.g. yellow)
spline (color e.g. blue).
* To set up layers > Main menu > View > Layer list and add (+) and name a new layer.
2. On layer 'construction' draw a line 1104.9 mm long.
3. On layer 'point' - using 'N points on line' tool, place 15 points on the line.
4. On layer construction again (switch between layers by selecting the layer you wish to work on in the layer list > View > layer list) draw vertical lines (19 mm long) from the 'center/peak' points (see snap shot).
5. On layer 'spline' draw a spline (Fit points).
* dxf file attached
Attachments
Continuous wave.dxf
(53.34 KiB) Downloaded 583 times
Wave.png
Wave.png (1.69 KiB) Viewed 8319 times

User avatar
Husky
Moderator/Drawing Help/Testing
Posts: 4935
Joined: Wed May 11, 2011 9:25 am
Location: USA

Re: Using splines to draw the profile of corrugate metal roo

Post by Husky » Wed Sep 26, 2012 9:38 pm

Just a different thought of doing this is:

Working with Circles and Tangents ...
roof 1.png
roof 1.png (3.92 KiB) Viewed 8394 times
Break out, trim and delete what you don't need ...
roof 2.png
roof 2.png (2.6 KiB) Viewed 8394 times
Move/Copy until you reach your estimated length ...
roof 3.png
roof 3.png (2.52 KiB) Viewed 8394 times

nigelblake
Registered Member
Posts: 2
Joined: Wed Sep 26, 2012 4:16 pm

Re: Using splines to draw the profile of corrugate metal roo

Post by nigelblake » Wed Sep 26, 2012 9:51 pm

Thanks Clive and Husky for your quick and very helpful response. I am using QCAD 3.0 the full edition and finding it an impressive tool. Your responses help show how flexible it is. Much appreciated Nigel

Post Reply

Return to “QCAD 'How Do I' Questions”