Among the most detailed drawings in our possession is this print, from the records of Tillotson Construction Co., of Omaha, for a 100,000- to 129,000-bushel, single-leg reinforced-concrete grain elevator.
We assume that Ted Morris executed the drawings for the company. We do not see notations for the scale of these drawings in inches to feet, as in others previously posted. Otherwise, the drawings are meticulously rendered.
To the left above is the cross-section of the structure. The main house has four tanks (silos) with internal diameter of 14 feet six inches and, with 100-foot drawform walls, a 102,500-bushel capacity is achieved. At 120 feet, the capacity increases to 128,900 bushels.
The cupola is marked as 22.0 feet high and 34.0 feet wide. Special markings indicate the dimensions of segments within and atop the cupola. A notation at the roof indicates the centerline of the driveway far below. We also see inscriptions for the head pulley, top of manlift travel, an interior ladder nearby, and to the far left, a 10-inch-diameter, 14-gauge spout.
In the main house, bins are numbered. From left to right, we see internal Bins 5, 11, 12, and 15.
Above the driveway and work floor, a space that extends 17.0 feet accommodates the 12.0-foot steel overhead-curtain-type door and electric truck-lift rails. The grate is 9.0-feet wide. The pit goes 12.0 feet below the main slab. A note indicates “Typ. Base Sash Elev.,” the meaning of which is open to interpretation although it obviously refers to a window. An entry in the Standard Machinery list includes, “Industrial steel windows & Doors @ Cupola & Work Floor.”
Below the cross-section is a Boot Pit Plan showing two pits and a ladder up, with dimensions given.
The Bin and Foundation plans give the various specifications and dimensions, including a 44.0 x 44.0 slab and 9 foot 9-inch radius from center of a tank to the outside perimeter.
The Bin Roof & Cupola Floor Plan includes such juicy details as the dimensions of wall openings under the roof and louvres under eaves and indicates three “B24141 cpd” windows. A key to symbols explains markings for “C.I. 24-inch manhole [with] ladder below,” “C.I. 20-inch roof scuttle,” “S.M. 20-inch removable grate and cover,” and 10-inch 14-gauge spouts. The scale is rated for 10 bushels.
The Work Floor and Driveway Floor Plan shows the driveway curtain door is 11.0 feet wide and opens to an area with 13.0 feet of clearance. The two dump grates are indicated. No. 1 is 9.0 x 3.5 feet )or it could be 5.5 feet), and No. 2 is 9 x 15 feet. Doors are 3070 doors.
The Distributor Floor Plan depicts 18 funnels at 16-inch centers, and a radius of 4 feet 7 inches from center. There are four of the B24141 C.P.O. windows.
The Scale Floor Plan shows the scale, a ladder up, and the load-out spout, as well as various dimensions.
The list of Standard Machinery includes the following:
- Head & Boot Pulley 60 x 14-inch C.I.
- Belt 14-inch, six-ply
- Cups 12 x 6-inch Calumet at 9-inch centers
- Leg capacity 5,000 bushels/hour
- Head drive 25 or 30 H.P.
- Truck Lift 7 1/2 H.P. Elec.
- Manlift 2 H.P. Elec.
- Dust col. System 3 H.P. Fan @ Head, Disch[arge] to Bin
- Leading Out Scale 10 Bu. Richardson
- Leading Out Spout 8 1/4-inch well casing
- Cupola Spouting 10-inch-diameter, 14-gauge steel
- Car Unloading Facilities By Gravity, Direct to Boot
- Distributor 12-inch Radial-Operate from Wk. Floor
- Dr’way Doors Overhead Custom-Hand Open
Other than the fact that I appreciate art in any form, most of this is over my head as far as technical information. I have seen constructed elevators, or course, but to see the plans and try to integrate them with actual structures is more daunting. Are there plans to post completed elevators that match these drawings? I find this subject one of importance for its history that may be disappearing in front of us. Thanks for continuing to keep up the series.