These drawings reproduced from the records of Tillotson Construction Co., of Omaha, show the general-plan details of a 150,000-bushel, single-leg, reinforced-concrete elevator.
To the left above, seen at the scale of one-quarter inch to one foot, is the cross-section of the structure. The main house has five tanks (silos) with internal diameter of 16.0 feet and achieves a height of 120 feet. No dimensions are shown for the cupola; the only notation in the plan says “automatic scale.”
In the main house are notes saying, “Up Leg” and “Down Leg. Other say, “Elect. Truck Lift” and “Dump Grate.” The driveway door is 13.0 feet high.
A precisely rendered rail car provides a fanciful touch on the far right, where it’s positioned at the load-out spout to receive a cargo.
At the very bottom, we see a 21.0-foot depth below the main slab.
The work floor plan (center) is rendered at the scale of three-sixteenths inch to one foot. We see that the whole structure sits on the slab measuring 50.0 x 47.0 feet. Internal diameter of the tanks is 16.0 feet. Notes show the locations of the electrical room, two manholes, dump grates, and at far right the dock.
The bin plan, also three-sixteenths to one foot, shows the five large tanks with Number 1 in the lower-right and the progression going counter-clockwise to Number 5 on the lower-left.
Sandwiched inside are Bins 6 through 16. We see that Bins 6, 8, 10 and 12-16 are marked as being 10.0 feet wide. Bin 9 is 7 feet 6 inches across. Bin 14, on the far right, is 13 feet 9 inches across. Bin 16 is labeled “Dust Bin.”
The large tanks Numbers 1 to 5 have capacities of 17,650 bushels. The internal bins are as follows:
- Bins 6-7: 5,300 bushels
- Bins 8 & 10: 6,790 bushels
- Bin 9: 6,000 bushels
- Bin 11: 6,540 bushels
- Bin 12: 2,640 bushels
- Bin 13: 5,300 bushels
- Bin 14: 8,220 bushels
- Bin 15: 7,980 bushels
- Bin 16 (Dust Bin): 930 bushels
Unlike any of the other plans we have, this one is dated. One entry in the lower-right says, “Rec’d 3-3-58.” There are two other illegible dates, but at very bottom another date shows 3/31/58.
The initials “TM” would seem to indicate that Tillotson’s Ted Morris executed the drawings.
I loved that drawing of the rail car!