organ bass pedals

Each pedal should "meet" at a point 9 feet from the front of the sharps. On the image above to the right, you can spot the markings where the sharps will be placed. The distance between each natural (for example C-D, D-E) is 2.5 inches (6,35mm). This measurement should be from the center of each pedal, but you can simply measure from one side of, say, pedal C1 to the same side of the D1 pedal (C1 being the leftmost pedal). Each octave should be 17.5 inches (44,45mm) - this distance must be maintained. A quick run-through of the measurements (32 note compass, CCC to G, AGO standard): (8'6" means eight feet and 6 inches) •Concavity: 7'6" to 8'6"(both at the front and at the back - i used 9', but I'll go with it anyway) •Radiation: 8'6" to 9'6" (i went for 9') •Length between toe board and heel board (or playing surface of the naturals): 27" •Length of playing surface of sharps: 6.5" •Height of sharps above naturals: 1" at player's end, 1.5" at the other end (foremost) •Width of playing surface: 7/8" to 15/16" (I used 22mm) •Radius of curve of sharps: 8'6" at players end, 9' at the other end (foremost) •Depth of touch: 0.5" at the front line of sharps. •Weight of touch: 2.5 to 3 pounds •Point of speech: midway between top and bottom of travel of the pedal key •Placement in relationship to the keyboard: ◦centered under the manuals, middle E is in the center ◦29.5" from playing surface of keyboard to the top of the middle E ◦Front to back: Pedal DD# (or D2#) front end (at players end) 8.5" to 10" from plumb line dropped from the front edge of keys on the lowest keyboard for 2 or 3 manual organ. 11" for a 4 manual organ. http://www.fagerjord.org/index.php/organ-project/38-organ-related/69-building-a-pedal-board?start=1