Signs of the Times - October 2017 - 30

NUTS + BOLTS
BILL

DUNDAS

CRUCIAL
CONNECTIONS

is a sign-industry consultant and the former
manager of technical
and regulatory affairs
for the ISA. Email him at
wsdundas296@gmail.com

Safety and durability of sign structures hinge on multiple factors.

UST as a chain is only as strong as its weakest
link, the integrity of an outdoor sign depends on
careful consideration of various design factors
and faithful execution of these details by the
sign builder and installer. Because outdoor signs are exposed
to a variety of punishing environmental effects including
cyclic wind-loading (i.e., repeated fluctuations of loads

J

Because twin-pole signs are structural arches, their
damping properties typically exceed those of singlepole signs.
30

SIGNS OF THE TIMES

OCTOBER 2017

and corresponding stresses applied to the structure), both
the general type of structure and the specific geometry of
structural connections have substantial impacts on safety
and durability.
SINGLE-POLE CONCERNS
An engineering research project conducted by the Intl. Sign
Assn. (ISA) during the period 2008-13 (www.signs.org/
Resources/TechnicalRegulatoryResources/EngineeringandInstallation/SignStructureResearchExecutiveSummary.aspx)
represents a prominent example of this relationship. A
key finding of the study is that single-pole sign structures
are susceptible to dynamic wind effects which, in certain
cases, may lead to structural failures. Specifically, the
research cites structural damping as a key factor impacting durability of these signs.
Because wind-actuated movements of single-pole structures are relatively unrestrained compared to double-pole

Periodic inspections of anchor bolts and base-plate
welds are essential for proper sign maintenance.


http://www.signs.org/Resources/TechnicalRegulatoryResources/EngineeringandInstallation/SignStructureResearchExecutiveSummary.aspx http://www.signs.org/Resources/TechnicalRegulatoryResources/EngineeringandInstallation/SignStructureResearchExecutiveSummary.aspx

Table of Contents for the Digital Edition of Signs of the Times - October 2017

Signs of the Times - October 2017
Contents
From the Editor
St Update
At Large
Tech Review
Vehicles + Vinyl
Design Matters
Nuts + Bolts
Vital Signs
Can You Make That in Neon?
Fabricating Bannerisms
Strictly Electric: It’s Good to Bb King
New Products
Advertising Index
Last Look
Signs of the Times - October 2017 - Intro
Signs of the Times - October 2017 - BB1
Signs of the Times - October 2017 - BB2
Signs of the Times - October 2017 - Signs of the Times - October 2017
Signs of the Times - October 2017 - BD_L
Signs of the Times - October 2017 - BD
Signs of the Times - October 2017 - Cover2
Signs of the Times - October 2017 - 1
Signs of the Times - October 2017 - Contents
Signs of the Times - October 2017 - 3
Signs of the Times - October 2017 - 4
Signs of the Times - October 2017 - 5
Signs of the Times - October 2017 - 6
Signs of the Times - October 2017 - 7
Signs of the Times - October 2017 - From the Editor
Signs of the Times - October 2017 - 9
Signs of the Times - October 2017 - St Update
Signs of the Times - October 2017 - 11
Signs of the Times - October 2017 - 12
Signs of the Times - October 2017 - 13
Signs of the Times - October 2017 - 14
Signs of the Times - October 2017 - 15
Signs of the Times - October 2017 - 16
Signs of the Times - October 2017 - 17
Signs of the Times - October 2017 - At Large
Signs of the Times - October 2017 - 19
Signs of the Times - October 2017 - 20
Signs of the Times - October 2017 - 21
Signs of the Times - October 2017 - Tech Review
Signs of the Times - October 2017 - 23
Signs of the Times - October 2017 - Vehicles + Vinyl
Signs of the Times - October 2017 - 25
Signs of the Times - October 2017 - 26
Signs of the Times - October 2017 - 27
Signs of the Times - October 2017 - Design Matters
Signs of the Times - October 2017 - 29
Signs of the Times - October 2017 - Nuts + Bolts
Signs of the Times - October 2017 - 31
Signs of the Times - October 2017 - 32
Signs of the Times - October 2017 - 33
Signs of the Times - October 2017 - 34
Signs of the Times - October 2017 - 35
Signs of the Times - October 2017 - 36
Signs of the Times - October 2017 - 37
Signs of the Times - October 2017 - Vital Signs
Signs of the Times - October 2017 - 39
Signs of the Times - October 2017 - 40
Signs of the Times - October 2017 - 41
Signs of the Times - October 2017 - 42
Signs of the Times - October 2017 - 43
Signs of the Times - October 2017 - Can You Make That in Neon?
Signs of the Times - October 2017 - 45
Signs of the Times - October 2017 - 46
Signs of the Times - October 2017 - 47
Signs of the Times - October 2017 - 48
Signs of the Times - October 2017 - 49
Signs of the Times - October 2017 - Fabricating Bannerisms
Signs of the Times - October 2017 - 51
Signs of the Times - October 2017 - 52
Signs of the Times - October 2017 - 53
Signs of the Times - October 2017 - 54
Signs of the Times - October 2017 - 55
Signs of the Times - October 2017 - Strictly Electric: It’s Good to Bb King
Signs of the Times - October 2017 - 57
Signs of the Times - October 2017 - 58
Signs of the Times - October 2017 - 59
Signs of the Times - October 2017 - 60
Signs of the Times - October 2017 - 61
Signs of the Times - October 2017 - 62
Signs of the Times - October 2017 - 63
Signs of the Times - October 2017 - 64
Signs of the Times - October 2017 - 65
Signs of the Times - October 2017 - New Products
Signs of the Times - October 2017 - 67
Signs of the Times - October 2017 - 68
Signs of the Times - October 2017 - 69
Signs of the Times - October 2017 - 70
Signs of the Times - October 2017 - 71
Signs of the Times - October 2017 - 72
Signs of the Times - October 2017 - 73
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Signs of the Times - October 2017 - 75
Signs of the Times - October 2017 - 76
Signs of the Times - October 2017 - 77
Signs of the Times - October 2017 - 78
Signs of the Times - October 2017 - 79
Signs of the Times - October 2017 - 80
Signs of the Times - October 2017 - 81
Signs of the Times - October 2017 - 82
Signs of the Times - October 2017 - 83
Signs of the Times - October 2017 - 84
Signs of the Times - October 2017 - 85
Signs of the Times - October 2017 - 86
Signs of the Times - October 2017 - 87
Signs of the Times - October 2017 - 88
Signs of the Times - October 2017 - 89
Signs of the Times - October 2017 - 90
Signs of the Times - October 2017 - 91
Signs of the Times - October 2017 - 92
Signs of the Times - October 2017 - 93
Signs of the Times - October 2017 - 94
Signs of the Times - October 2017 - Advertising Index
Signs of the Times - October 2017 - Last Look
Signs of the Times - October 2017 - Cover3
Signs of the Times - October 2017 - Cover4
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