Barn Preservation Society
to the Study and Preservation
of New World Dutch Barns
FALL 2002 Vol. 15, Issue 2STATICS
(Conclusion of the History of the American Dutch
By the time the
first American-Dutch Barn was built in 1680, sophisticated science
in structural design had been developed in Europe. Buildings
up to that time were one of a kind and built by the trial and
error method. They evolved without prescience. Structural integrity
was a matter of experience. Any departure from the old way was
a gamble that might, or might not, end-up with fracture from
overload. This possibility still plagues engineers with new concepts,
i.e. World Trade Center and the Tacoma Narrows Bridge.
(Dates That Relate to Barn Mechanics)
585 BC THALES of Miletus, introduced Egyptian geometry to Greece.
550 BC PYTHAGORAS of Samos, practiced geometry.
380 BC PLATO, philosopher.
350 BC ARISTOTLE, designed a system of science.
325 BC EUDOXUS, advanced geometry.
300 BC EUCLID, father of geometry.
250 BC ARCHIMEDES, mechanician supreme, discovered pi.
1500 AD LEONARDO, developed the parallelogram of forces.
1586 AD SIMON STEVIN of Bruges (Flemish), built upon Leonardo and
mechanics and philosophy.
1600 AD ROME, scientific society formed.
1625 AD DESCARTES, in Netherlands, advanced algebra, established
science as a physical rather than a spiritual discipline.
1638 AD GALELEO, started statics. Published in Netherlands.
1642 AD SIR ISAAC NEWTON, statics.
1680 AD FIRST AMERICAN DUTCH BARN.
Holland and vicinity, in the 17th century, was a
hotbed of activity in the mechanical sciences. Simon Stevin of
Bruges, then Netherlands, built upon Euclid and Leonardo mechanics
and philosophy. His book, ELEMENTS OF STATICS, in 1586,
while largely philosophical, was a first. Then it was Descartes,
in Holland, who established science as a physical rather than a
Scientific societies were begun in London in 1660 and in Paris
in 1667. Of special note was Sir Isaac Newton (1642-1727) in England.
Among his many discoveries were the "Laws of Similarity." These
provided for model analysis. A structure could be built in miniature
to exact scale and material, loaded proportionately, and tested
for strength. (Complete Book of Science, J.j. Little & Ives
Co. Inc. NY, Page 1735)
The science of static's, (bodies at rest), received its greatest
break through in 1638. Galileo, ostracized from Italy, went to
Lieden, in Holland to publish his book, TWO NEW SCIENCESI (figure
1). In those papers, he established principles that affect all
of us everyday. He said:
"Any given ruler or prism, whose width exceeds its
thickness, will offer greater resistance to fracture when standing
on edge than when lying flat, and this is the ratio of the
width to the thickness."
The rule for a beam then became:
"Load capacity, of a beam, is proportional to the width,
to the square of the depth and inversely proportional to the
This simple statement would dictate the structure of all future
barns, homes, skyscrapers, and bridges, exerting a vast influence
on civilization. Without the notoriety, it would rival the popular
Einstein formula E=MC2, in its effect on humanity.
It was indeed the dawn of modern technology. The barn designer
could then, with certainty, dimension timbers suitable to the task.
With that host of knowledge, and the confidence it generated, its
no wonder the American Dutch Barn was the first built in such abundance.
The late Vincent Schaefer once told me that he thought that the
Dutch Barn was, "over built." He did not elaborate. Galileo's
formula and Newton's law will test the anchor beam ofthe American
Given is a beam of 30' length, a 10" width, and 20" depth.
The bents are Hemlock and on 10' centers. The load will consist
of a crop of sheaves, the poles they sit on and the beam itself.
(See figure 2 below)
Sheaves - 40500 Lbs.
Poles - 1018 Lbs.
Beam - 1168 Lbs.
TOTAL LOAD - 42686 Lbs.
Galileo's formula designates a relative strength for different
Width x Square of Depth = Relative strength
10" x (20" X 20") = 133.3
Newton's model analysis is taken from a piece of the species of
wood, 1" x 1", a one foot span of which is subjected
to a breaking force at the center. Hemlock will break at a weight
of 5000 Lbs. This
"Unit Strength" then multiplied,by the relative strength
of the beam is what a concentrated Load the Hemlock beam will hold.
Click on graphic to view rest of
Once domestic consumption was satisfied, one could look at exports
to gauge the productivity of our country (DBPS N/Ltr Fall 2001).
In the 20th century, metals and manufacturing were 60% of all exports.
In the 19th century, cotton and cotton products were 64% of all
exports. In the 18th century, the expendables tobacco, grain, fish,
and rice accounted for 68% of all exports. The success of manufacturing
can be traced to the
"Assembly line," introduced by Henry Ford. The cotton
revolution came about because of the II Eli Whitney Cotton Gin." Where
grain was concerned, New York State and the" American Dutch
Barn", did their part. So much so, that the US eventually
became the leading wheat exporter in the world. Credit was also
due to the colonial farmer and that included the 95% of the population
engaged in farming. So much of written history concerns the butcher,
baker, candle stick maker, politician and soldier. The vast number
of country folk received little attention in the history books.
The barn was of little use without them.
ROBERT J. ANDERSEN
The following are two interesting letters exchanged between two
serious barn watchers.
Sept. 25, 2002
Enclosed are draft drawings and a couple of photographs of the
ZIMMERMAN barn, located in Plymouth County, in the northwest corner
of Iowa. None of this material need be returned to me, but I would
welcome your opinion on any link you see between the Zimmerman
barn and the New World Dutch Barns. I've done a little reading
in Fitchen now and while this. is clearly from the wrong century
and part of the country to be a NWDB, it does seem to me that the
Z barn could be derivative.
Mr. Zimmerman was born in Germany and this part of Iowa has both
a strong ,!utch presence in Orange City and a history of East Frisian
immigration to rural countryside. At this point, though, I'm unclear
as to exactly how the Dutch relate to the East Frisians and how
both relate to Germany (I've been assuming that there is a borderline
territory and/or islands over which ownership has varied).
The barn's heavy timber frame is of milled wood with pined and
nailed mortise and tenon joinery. While I have run across heavy
timber frame barns in northwest Iowa before, I continue to think
it is unusual for someone to chose to build with this technique
when balloon framing and plank and stud lumber were more common,
probably cheaper and certainly easier to use. This is the "high
prairie" of lowa-not quite the Dakotas, but nearly so-and
there were few trees here. The railroad would have been hauling
limber to the area for building purposes for at least the 25 years
prior to the construction of the Z barn. Also, I think the frame
is of fir rather than a native Iowa hardwood or North Woods white
pine. Douglas fir would have come from the Pacific Northwest at
this time, though it may have been milled in one of the Mississippi
River towns prior to distribution. In any event, it's clear to
me the barn's framing method was a choice, not a necessity. The
H-bents and long sloping roof, terminating in 8-foot sidewalls,
just feel like the offspring of a NWDB.
I'd be interested in absolutely anything you'd like to comment
on! Please feel free to email me or I can call you if you'd like
me to. Thank you so much in advance.
Jan Olive Nash
Sept. 30, 2002
I received your drawings, photographs and letter about the Zimmerman
barn. They are very descriptive. About 10 years ago I spent time
looking at and documenting barns in the Holland area of Michigan
where timber framing continued well into the 20th century. The
next year I took a trip to Pella, Iowa and other places that had
mid 19th century Dutch immigrants. The only "Dutch" barns
I found were in Michigan and they remind me very much of the Zimmerman
barn. A year ago I went on a twoweek tour of Holland and Germany
organized by the Arnhem museum and a friend from Breitenheim.
The Z barn has the Dutch and north German characteristics of being
an aisle barn with low sidewalls that include animals, grain storage,
"English" barns are smaller and they tend to have specialized
outbuildings. The Z barn is based on the H-bent. In Holland this
construction seems very localized around Guilderland. In the rest
of Holland and Germany we saw only decbalk (balk=beam) construction
where the beam is joined to the top of the column whereas the ankerbalk
(anchor beam) is a drop tie mortised to the column to form the
H-bent. I found only one decbalk barn in Holland, Michigan; the
only one I have seen in America.
Since the early 17th century, Hudson Valley frame houses and barns
have been based on the Hbent. New England frame houses and barns
began being built with what is sometimes called a box frame with
flared posts and principal rafters. They were one- or two-story
houses where they were story and a half in the Hudson Valley. English
framing is very complex and was gradually abandoned, especially
in barns, in favor of the drop tie and common rafter. This can
be seen as a development that originated in the Hudson Valley (see, Field
Guide to New England Barns and Farm Buildings, Thomas Visser,
1997) and became the American timber frame that moved west. I am
sure that many people would disagree with this and no doubt the
truth is more subtle than I make it sound, but it looks to me that
Zimmerman came with his German aisle barn tradition and adopted
it to the American drop tie frame.
I will copy your material and send it to the Dutch Barn Pres.
Soc. and to Bud Miner, NWDB 2000, who is trying to make Midwest
links. Friessan barns are very distinct and I used to call the
decbalk a Friesan bent but I'm not sure that it is a bent. Their
barn is the stolp.
Peter Sinclair West Hurley, NY
Jan Olive Nash is one of
the Tall Grass Historians of Iowa City, Iowa.
Peter Sinclair is President of the Hudson Valley Vernacular Architecture
Society and Trustee Of the Dutch Barn Preservation Society.
Dutch Barn Preservation Society
The Mabee Farm Historic Site
1080 Main St. (Rt. 5S)
Junction, NY 12150
Phone: (518) 887-5073
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