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Metal
Roofing And Metal Buildings Are Prone To Lightning Strikes.
This is a classic example of myths that surround metal construction
products. The industry reports that I’ve read on this topic indicate
that, all things being equal, metal roofs and metal buildings are no
more likely to suffer lightning strikes than buildings that use other
non-metal materials. Like other structures, metal buildings and roofs
can be struck by lightning, but they are not “magnets” for lightning.
Thankfully, there are lightning protection systems that can be installed
to effectively address this problem, no matter what building materials
are used.
Metal Buildings Are All Boxes.
I have to admit that this was one of my preconceived notions of metal
buildings when I first started covering this marketplace in the mid
1980s. I soon learned that descriptions of metal buildings as boxes were
no more accurate than to equate all metal buildings with the venerable
Quonset huts of military barracks fame. I’ve seen metal building
systems, or pre-engineered buildings as they’re often called, used to
create multi-story office facilities, octagonal churches, winged school
campuses, distinguished federal buildings and a vast variety of low-rise
facilities. Sure, some of them do fall into the simple box-like
structure category, but that’s a very small percentage of the overall
market.
Metal
Buildings Are OK, If You Can Make Your Needs Fit What’s In Stock.
Manufacturing practices in the metal building industry have evolved
considerably over the years. In most cases, the old methods of running
“stock” buildings through the production process are gone. I’d imagine
it still goes on in some places, but the industry practice today is to
manufacture each building after it has been custom ordered. If you’d
like a metal building in an unusual length, width, eave height or any
other configuration, it’s a pretty sure bet that you can have it made…as
long as it meets engineering standards. Feeding this “stock” metal
building myth are advertisements that list prices for buildings in
particular sizes; in most cases, these are just examples to offer ideas
to potential customers. With few exceptions, when you order your
building it’s made to your specifications. Makes you feel kind of
special, doesn’t it?
Metal
Roofing And Wall Panels Only Come In Standard Lengths.
Similar to the previous item about “stock” metal buildings, I was
recently surprised when someone told me that they needed “odd” panel
lengths, and weren’t looking forward to shearing a few inches from every
panel. While it’s true that supply centers stock metal panels in certain
lengths, that’s only for convenience. Ask them to order the same panels
in your specific length and you’ll find that virtually any increment, at
least down to the inch, is available. Depending on the size of your
project, custom colors are also a possibility if you’d like to step
outside the ever-broadening color palette that’s available from most
panel manufacturers.
Cold-Formed Steel Framing Means No Strength.
I’m far from being mistaken as an engineer, but I have had the
opportunity to walk through many cold-formed (we used to call them
light-gauge) steel structures as they were being built and upon
completion. I used to be amazed at cold-formed stud walls that extended
25 feet from floor to ceiling, or to know that those same lightweight
framing components could be assembled to create roof trusses that were
able to handle tile roofing (though I'd suggest a lighter, metal roofing
alternative) and northern snow loads. I soon learned that even though
the components are light, cold-frame steel can be engineered for
incredible strength.
Hopefully I’ve
helped put some metal construction myths to rest, though I understand if
you’d like more proof than just my words in this column. For more
information on metal buildings, metal roof and wall panels, cold-formed
steel, lightning protection and a variety of other topics, check out
Hawn
Zuver is editorial/content director for Design and Build with
Metal. He has been covering the
metal. |