engineering

Peavey–Haglin Experimental Concrete Grain Elevator

Peavey–Haglin Experimental Concrete Grain Elevator is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Peavey–Haglin Experimental Concrete Grain Elevator rather than just read about it. In short: The Peavey–Haglin Experimental Concrete Grain Elevator is the world's first known cylindrical concrete grain elevator. It was built from 1899 to 1900 in St.

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Reference excerpt

The Peavey–Haglin Experimental Concrete Grain Elevator is the world's first known cylindrical concrete grain elevator. It was built from 1899 to 1900 in St. Louis Park, Minnesota, United States, as an experiment to prove the design was viable. It was an improvement on wooden elevators that were continually at risk of catching fire or even exploding. Its cylindrical concrete design became the industry standard in the United States, revolutionizing grain storage practices. After its initial experiments, the Peavey–Haglin Elevator was never again used to store grain. Since the late 1960s it has been maintained on the grounds of the Nordic Ware company and is painted with their name and logo. The Peavey–Haglin Elevator was listed on the National Register of Historic Places in 1978, proclaimed a National Historic Landmark in 1981, and a National Historic Civil Engineering Landmark in 1983.

Background Frank Peavey (1850–1901) was a native of Maine who moved to the Midwest as a young man and became a grain merchant. His business was buying grain from farmers and storing it in elevators before delivering it to flour mills. Basing himself in Minneapolis in 1881, he became known as the "Elevator King", owning elevators across Minnesota and Iowa and expanding into the Dakotas. However the wooden elevators of the day were quite vulnerable to fire, as they were built of flammable material, filled with volatile grain dust, and usually stood next to railroad tracks with their spark-spewing locomotives. Numerous elevator fires were causing insurance rates to skyrocket. Peavey was convinced that new construction methods could produce a large, fireproof grain elevator. He hired Charles F. Haglin (1849–1921), a local civil engineer, to work on the problem with him. They quickly recognized the promise of reinforced concrete, a recent innovation popularized in the 1880s.

Initial construction Even though other engineers argued that their design would explode when filled or crack when emptied, Peavey and Haglin proceeded with their plan for a cylindrical concrete structure. Construction began in the summer of 1899. Skeptics dubbed it "Peavey's Folly". Haglin built a section of round formwork braced with steel hoops. Concrete was poured in and given time to harden, at which point the framework was removed and reassembled above to produce the next section. In this manner the elevator was built up to a height of 68 feet (21 m). The interior diameter was 20 feet (6.1 m), while the walls tapered from 12 inches (30 cm) thick at the base to 8 inches (20 cm) at the top. By fall the elevator was ready, and Peavey had it filled with grain. The form held and the grain was left to see how it would fare over the winter.

European tour While they waited, Peavey dispatched Haglin to Europe to investigate reports of reinforced concrete elevators there. Haglin was accompanied by his young son Eddie and Peavey's son-in-law Frank Heffelfinger. From January to March 1900 they toured grain facilities and met with experts in London, Hamburg, Braunschweig, Copenhagen, Budapest, Brăila, Galați, Bucharest, Vienna, and Paris. They found some elevators of concrete, but all were rectangular or hexagonal, and most were atop steel or wood bins. Others were built of brick or mortared stone. Upon his return to Minneapolis, Haglin reported that their European counterparts were no more advanced on the issue than Americans.

Success and legacy In spring 1900 it was time to empty the experimental elevator. A crowd gathered, but kept their distance, still expecting some kind of catastrophe. Haglin had faith in his structure, however, and stood right at its foot to pull the lever and allow the grain to pour out into an adjacent pit. The elevator stayed perfectly intact and the crowd began cheering. Haglin went on to increase the height of the elevator to 125 feet (38 m) for a few further experiments. After those proved successful as well, the elevator prototype never held grain again. Peavey immediately commissioned Haglin to build a grain elevator complex in Duluth. Widely publicized, Peavey and Haglin's cylindrical concrete design was quickly adopted throughout the American Midwest. While traditional wooden elevators, usually clad with metal siding, remained common for storage near farms, the new design sprang up at shipping centers, revolutionizing the grain storage industry. Grain elevators, usually the tallest structure on the flat Midwestern landscape, became a symbol of productive agriculture.

Later history Frank Peavey didn't live to see his project revolutionize the industry; he died unexpectedly of pneumonia on December 30, 1901. The experimental grain elevator stood unused as various industries came and went around it. In the 1950s the property was owned by Lumber Stores, Inc. and the elevator was painted with their name. Nordic Ware, a cookware company best known for introducing the Bundt cake pan, was founded nearby in 1946 and ultimately purchased the land with the elevator as they expanded their business. In 1969 Nordic Ware discovered that the elevator was deteriorating and in danger of collapsing. Cognizant of the structure's history, the company invested $40,000 in a restoration project. Around this time the elevator was painted with the Nordic Ware advertisement it still bears. The Peavey–Haglin Experimental Concrete Grain Elevator now stands near the busy interchange of State Highways 7 and 100. It overlooks the Nordic Ware factory complex, the Cedar Lake Trail, and Lilac Park.

See also List of grain elevators List of National Historic Landmarks in Minnesota National Register of Historic Places listings in Hennepin County, Minnesota

References

External links Historic American Engineering Record (HAER) No. MN-25, "Peavy–Haglin Experimental Concrete Grain Elevator, Southeast Corner Highways 7 & 100, Saint Louis Park, Hennepin County, MN", 1 photo, 1 data page, 1 photo caption page

Illustrations

Worked examples

Example 1 — a first encounter with Peavey–Haglin Experimental Concrete Grain Elevator

Start with the simplest possible case. Write down what Peavey–Haglin Experimental Concrete Grain Elevator claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Peavey–Haglin Experimental Concrete Grain Elevator before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Peavey–Haglin Experimental Concrete Grain Elevator ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Peavey–Haglin Experimental Concrete Grain Elevator

In research: Peavey–Haglin Experimental Concrete Grain Elevator appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Peavey–Haglin Experimental Concrete Grain Elevator in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Peavey–Haglin Experimental Concrete Grain Elevator is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1899 establishments in Minnesota, Agricultural buildings and structures on the National Register of Historic Places in Minnesota, Buildings and structures in Hennepin County, Minnesota, so understanding it makes those chapters shorter.
In everyday life: Look for Peavey–Haglin Experimental Concrete Grain Elevator outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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Frequently asked questions

What is Peavey–Haglin Experimental Concrete Grain Elevator in simple terms?

The Peavey–Haglin Experimental Concrete Grain Elevator is the world's first known cylindrical concrete grain elevator. It was built from 1899 to 1900 in St.

Why does Peavey–Haglin Experimental Concrete Grain Elevator matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Peavey–Haglin Experimental Concrete Grain Elevator?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Peavey–Haglin Experimental Concrete Grain Elevator.