1. A new dawn for...
In 2015, welcome to...
Digital Re-print -
September | October 2014
STORAGE - Silo design & construction
Grain & Feed Milling Technology is published six times a year by Perendale Publishers Ltd of the United Kingdom.
All data is published in good faith, based on information received, and while every care is taken to prevent inaccuracies,
the publishers accept no liability for any errors or omissions or for the consequences of action taken on the basis of
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or by any means without prior permission of the copyright owner. Printed by Perendale Publishers Ltd. ISSN: 1466-3872
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3. F 30 | September - October 2014 GRAIN&FEED MILLING TECHNOLOGY
With over a century of
experience in the design,
quality and installation of grain
storage systems, Bentall Rowlands Storage
Systems Limited is a leading UK manufac-turer
in complete storage and processing
equipment for the agricultural and industri-al
markets.
We offer a wide range of galvanised steel
silos and hoppers, water tanks, catwalks
and platforms, material handling equipment,
cleaning and grading and weighing and drying
systems that are assembled worldwide.
Our engineering and technical expertise
combined with continued focus on customer
satisfaction places us in a strong position
to capitalise on the expanding market in
storage systems. With the capabilities to
design, manufacture, supply and install stor-age
systems from an extensive range of
products, we provide comprehensive end to
end solutions which can be designed to any
specific clients’ requirement.
We have designed and installed silos
worldwide, including the UK, Kenya, Thailand,
Germany, Holland, France, Ukraine, Malawi,
New Zealand and many more.
Kevin Groom, Technical Director says,
“Our storage systems are individually
designed for all clients. Each project has a
bespoke design that is sure to match, if
not exceed client expectations. We are
extremely proud of the projects that we
have undertaken in many challenging areas,
proving that whatever the specification, we
are sure to provide the most suitable design
necessary.
Silo Design
There are a number of reasons why each
silo/project is a bespoke design and it simply
comes down to the fact that not every
customer or area is identical. Geographical
conditions have a huge part to play in the
design of silos/projects as do climate condi-tions
and site limitations.
As the world’s populations increase we
are finding that the projects are becoming
closer to cities and towns. This brings with
it a new dimension where we have to take
into account the impact the project will have
on local areas. Not only the increase in local
traffic, but also dust and noise pollution is
becoming more of an issue.
When starting any new project, the first
round of meetings with a customer always
prove to be the most important. Great
attention to detail is a must when it comes
to a successful project. As a supplier we must
first understand the needs of the customer.
The “here’s one I made earlier” approach to
grain storage projects has become a thing
of the past.
The need for galvanising
Galvanisation is the process of applying a
protective coating of zinc to the raw materi-als
of the manufactured parts of the silos
in order to prevent rusting. In areas where
high levels of corrosion could be present,
this is a necessity. Compared to other com-panies,
we use G600 as standard whereas
some companies may only use G90. This
greatly increases the life expectancy of our
silos. For example, in tropical marine areas
where storage systems are required, you can
expect them to last somewhere around 35
years which is a huge advantage over other
companies. Countries that have high levels
of precipitation and humidity will rely on the
galvanising of the silos in order to protect
them from this corrosion. This is standard
on all types of storage equipment, to add
that extra bit of security on life expectancy.
Seismic activity
When we are tasked with the job of
designing a new storage facility, there has
to be a thorough inspection and survey
of the site done prior to any work taking
place. The geology of the area is key to the
design. When designing a storage system
for erection in a known earthquake region,
they must be designed to the countries
relevant seismic standards. All silos will need
to be built a great deal stronger to cater for
by Bentall Rowlands, USA

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5. 32 | September - October 2014 GRAIN&FEED MILLING TECHNOLOGY
the horizontal loading at ground level and it
is far better to keep the silos height down.
Silos that are shorter and wider are far bet-ter
than those that are tall and thin. When
seismic activity strikes, a structure that has a
larger base area is more likely to withstand
the pressures and remain intact. If you have
a taller and thinner structure, this presents a
huge amount of stress to the lower sections
of the silo which will ultimately result in the
collapse of this structure. Due to the fact that
the magnitude of earthquakes varies greatly, all
our silos are individually designed to suit each
areas requirement.
Dealing with high winds
High winds can cause great problems for
a number of structures, including our stor-age
facilities. We make sure that our silos
are designed to withstand gusts of 50m per
second, which equates to 180km per hour.
A couple of years ago, there were fierce
storms that occurred in the North of England,
Scotland. We had reports that all of the
silos withstood the gale force winds, with no
reported problems or damage. In areas where
silos could be prone to these high winds, the
structure needs to be quite similar to that
where seismic activity takes place. Silos will
withstand these huge wind speeds when they
are designed to cover a greater base area.
This gives them the stability needed to remain
intact once a storm is passing.
Temperature change
For countries that are prone to tem-perature
fluctuations, the design of the storage
system needs to be carefully thought out
- more so for countries prone to high levels
of moisture. In severe cold weather where
snow can be quite extreme, it is the roof of
the structure that needs to be one of the main
focuses. Snow load is the reason for engineer-ing
changes. When designing the roof, it is
important to know what depth of snow can
be expected in a given area. We designed a
bespoke storage system for an area within the
Ukraine where the snow can get extremely
deep. We specifically designed the roof on
each silo to be able to withstand a pressure
of 1 kn/m2 which equates to 1 meter of snow.
Why do silos fail?
On a number of occasions, the failure may
only involve distortion or deformation, which
doesn’t necessarily pose an immediate safety
hazard. On the other hand, failure can mean
complete collapse of the structure resulting
in the loss of use and in some cases, the loss
of life. The major causes of these failures
are predominately down to design errors,
construction errors and utilisation errors. We
make sure that our silos are built to meet the
specifications set out in the design, eliminating
any chance of silo failure. We work hard to
build the best relationships with our customers
and spend time making sure that they receive
the best possible service from the initial design
concepts through to installation and comple-tion
of the project.
More information:
www.bentallrowlands.com
+44 1724 282 828.
EC 1935/2004
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F
514573_GrainFeed-MillingTechnology_47x270_1g8b._047c.1.i4n d d0 8 :143
There are a number of reasons why each silo/
project is a bespoke design and it simply comes
down to the fact that not every customer or area
is identical. Geographical conditions have a
huge part to play in the design of silos/projects
as do climate conditions and site limitations

6. GRAIN&FEED MILLING TECHNOLOGY September - October 2014 | 33
BUILD YOUR LEGACY.
EMEA/Latin America +34 91 216 14 97
India +91 96 1922 1123
Asia / Oceania +1 204 227-6539
North America 888-WESTEEL (937-8335)
Protecting your hard work and investment is
critical. From initial drawings to delivery and
assembly, you can trust our dedicated team of
engineers, designers and logistics experts to
craft your perfect storage solution. Together
we can build your legacy.
Visit Westeel.com to begin your journey.
SIGNATURES
Proofer Account Executive
Creative Authorization of Process
JOB DETAILS / SPECS
DOCKET # 14WEST5263
JOB NAME Global Ag Campaign
PROOF # 4
PROOF DATE May 5, 2014
TRIM SIZE 190mm x 132mm
BLEED 190mm x 132mm
COLOUR 4 Colour CMYK
PUBLICATION Grain and Feed Milling
ISSUE DATE Jul / Aug 2014
DESIGNER SamG
STOP
info@westeel.com
F

7. LINKS
This digital Re-print is part of the September | October 2014 edition of Grain & Feed
Milling Technology magazine.
Content from the magazine is available to view free-of-charge, both as a full
online magazine on our website, and as an archive of individual features on
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Please click here to view our other publications on www.docstoc.com.
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• A new dawn for
GFMT
Our history and
our future!
INCORPORATING PORTS, DISTRIBUTION AND FORMULATION
September - October 2014
www.gfmt.co.uk
first published in 1891
In this issue:
• STORAGE
Silo design &
construction
• Weighbridges
crucial
factors and
considerations
• Irish Flour
Milling and
the German
connection
• Bagging systems
chosing the right
one for your needs
• Burundi’s
women of war
turn to rice
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please contact our Circulation and Subscriptions Manager on the link
adove.
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