ACADuser Posted June 21, 2023 Share Posted June 21, 2023 Steve has a nice method for slope roof crickets where the base line is level. But I'm needing a method for low slope roof with a parapet. My method is to get the height of the triangle in red and along with the length of the hypotenuse of the right triangle. Then calculate the small angle and apply it to a roof plane where the base aligns to the 12'-8.625" side. This works but was thinking there may be a simpler way. Any ideas? Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 Before drawing the sloped triangular portion (as shown in your image above) keep the main roof plane running through that area. Then, with your preferred slope already set in the roof dialog, draw a new roof plane starting exactly at the bottom, running parallel to the new plane's desired ridge. Extend the roof plan up to the desired ridge. Adjust the valley line to the 45 degree angle from the ridge. When you draw a roof plane directly over another roof plane, Chief will automatically start the new roof plane baseline elevation to match the elevation of the underlying roof plane at the location that you started drawing. Does that make sense? Link to comment Share on other sites More sharing options...
GeneDavis Posted June 21, 2023 Share Posted June 21, 2023 Robert's way is what I would do, and it produces information that is a good starting point for specifying the tapered roof insulation needed to build the cricket. Link to comment Share on other sites More sharing options...
ACADuser Posted June 21, 2023 Author Share Posted June 21, 2023 I think I understand but it does not seem to work. Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 Can you post your plan, Alan? Link to comment Share on other sites More sharing options...
ACADuser Posted June 21, 2023 Author Share Posted June 21, 2023 It's a rather large file so I sent you a link. I'd rather not post it here. Maybe I'll create a simple version for this test. Gotta take care of some other task right now. Thanks Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 @ACADuser I'll take a look. Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 @ACADuser A The height issue you described comes from the fact that the main roof pitch is 1/4:12 while the cricket is 1/2:12. To get a nice 45 degree valley, they'd need to be the same pitch. Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 If the cricket slope is reduced to 1/4:12, then they join nicely. Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 If you're preference is that the cricket slope remain at 1/2:12, then we will need to alter the baseline. To do this accurately, we first need to know the baseline and ridge elevation of the cricket at 1/4:12. In your case, the baseline is 306" and the ridge is 308 1/4". The difference of 2 1/4" is the critical number. Then, we need to know the length of the valley. All we need to do is dimension it or open that line and check it's length, In this case, it's approx. 152". Now we need to know the angle for 2.25" of rise over 152" of run. I simply drew an polyline and measured the angle. Now we can turn on the roof baseline layer and alter it. Once that layer is turned on, select the cricket roof plane and drag the END of the baseline to the high point of the valley. Then open the cricket roof plane dialog and make sure the baseline elevation is locked. You can then slope the baseline by entering the correct angle. Then change the roof pitch to 1/2:12. The result is that the roof pitch is now tilted and sloping towards the valley. Link to comment Share on other sites More sharing options...
ACADuser Posted June 21, 2023 Author Share Posted June 21, 2023 1 hour ago, robdyck said: If the cricket slope is reduced to 1/4:12, then they join nicely. Thanks for clearing that up, my mistake. Link to comment Share on other sites More sharing options...
ACADuser Posted June 21, 2023 Author Share Posted June 21, 2023 55 minutes ago, robdyck said: If you're preference is that the cricket slope remain at 1/2:12, then we will need to alter the baseline. To do this accurately, we first need to know the baseline and ridge elevation of the cricket at 1/4:12. In your case, the baseline is 306" and the ridge is 308 1/4". The difference of 2 1/4" is the critical number. Then, we need to know the length of the valley. All we need to do is dimension it or open that line and check it's length, In this case, it's approx. 152". That is the solution I came to in my original post although you did a better job figuring out the angle needed. I wanted a higher pitch in that cricket to better deflect the water. Although that may not be necessary. Thanks for your time & knowledge. Much appreciated. 1 Link to comment Share on other sites More sharing options...
robdyck Posted June 21, 2023 Share Posted June 21, 2023 3 minutes ago, ACADuser said: Thanks for your time & knowledge. Much appreciated. Glad I could help and that it actually made sense to you! Link to comment Share on other sites More sharing options...
ACADuser Posted June 21, 2023 Author Share Posted June 21, 2023 BTW, used your first method, and rotated the cricket -22.5 deg and that worked as well. Link to comment Share on other sites More sharing options...
JKEdmo Posted June 21, 2023 Share Posted June 21, 2023 2 hours ago, robdyck said: Chief will automatically start the new roof plane baseline elevation to match the elevation of the underlying roof plane at the location that you started drawing Thanks for this tip. I had a similar cricket problem last week and this is helpful. Jim 1 Link to comment Share on other sites More sharing options...
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