The length of ramp

[GHASEM_ARIYANI]

hi

How we calculate  length the surface slope ramp in revit?

[sureshchotrani]

What lenght you are looking exterior, interior or center?

Actually you can draw a line use command LI, use pick option for exteior & interior. For center you can use option offset.

Once draw when you select line you will get the lenth of line in properties:)

[GHASEM_ARIYANI]

I mean  is slope surfaceٍ  

not Sketching Mode.....

[GHASEM_ARIYANI]

The length of slope  surface Is different with Length the flat.

Of course Calculate the required length of ramp curve.

[L.Maas]

[L.Maas]

If you want to verify.

Created a sweep at the outer edge (used profile of 100x100 mm)

Created a sweep at the inner edge (used profile of 100x100 mm)

You see when selected the volume is 0.089 m3 (thus length 8.9 m)

Outer sweep was 0.153 m3 (thus length 15.3 m)

Center length would be (15.3+8.9)/2 =12.1

[GHASEM_ARIYANI]

Hi

Thank you for your good response

Can this formula to determine a schedule.

[GHASEM_ARIYANI]

with Method Global parameters in the project i did in the Revit Kepler.

[GHASEM_ARIYANI]

I think the formula is wrong، Maybe I'm wrong.

The flat length surface is Greater of the length surface slope.

Is it correctly ؟؟؟

[L.Maas · Accepted solution]

The formula is correct. If you look at my screenshot you see that it mentions 12138 mm. In my calculation I find 12132 mm. So a difference of 6 mm.

This is possibly attributed to some rounding along the way. Also my second method of using sweeps gives a result if 12.1 m.

Thus I do not see any mistakes

[GHASEM_ARIYANI]

Hi

I think second method is true.

What is the problem The first method For me??

[David_W_Koch]

You are using 1.3 and 3.3 as the d and D diameters, but your diagram indicates that these numbers are the radii.  D should be 6.6 and d should be 2.6.

Also note that the formula is only calculating the horizontal projection of the spiral.  You still need to determine the sloped length; if you know the overall ramp height, you can take the square root of the sum of the squares of the height and horizontal length to determine the sloped length.