How to Define the Face of a Lego Beam
First determine how long you want to make your beam.
This example with be 1x8 beam
Next, make an 8mm long construction line and repeat this 8 times.
Make sure it starts on the origin and the lines are horizontal going to the right
Then make 7 circles of equal measurements.
Then use the smart dimension tool on one circle and make it 4.80mm
Once they are all equal, select the center of one circle and the end of the first line, then press merge on the bottom left.
Repeat this step connecting each circle going one to right
Then make two vertical lines, select both of them, and make them equal.
Then make the lines 9.60mm long
Select the point were the vertical line and the construction line meet and make that 4.00mm
Finish by connecting the tops of the vertical lines together and the bottoms of the vertical lines together.
Select both and make them equal