POWER February 2017 - 23

Scaffold suppliers can help contractors
track every aspect of a project including
build and dismantle time, part in-service
time, total man-hours, cost per part, total
job cost, and comparison against projections.
For powerful evaluation capabilities,
some scaffold suppliers also offer software
tracking programs that provide costs down
to the fraction of a cent. The supplier typically
manages the tracking software as a
value-added service.
After engineering and planning, the
ability to provide local labor and support
is probably the factor contractors
value most. A good scaffold supplier will
maintain an inventory of tube-and-clamp
materials and be able to deliver several
thousand pieces at a moment's notice.
Delivery often takes place in wire storage
racks that hold up to 700 clamps and
300 to 400 tubes. Racks aren't just filled
with parts; rather, all the components for
a specific scaffold are pulled and placed
in a rack. These predesigned, self-erect
sets eliminate unnecessary handling. Depending
on the simplicity of access and/
or weight issues, the entire rack may be
placed on a handcart and wheeled into the
RCA.
Rigging and Shielding
While many RCAs have overhead cranes,
heavy components (notably valves, flanges,
and pipes) that need replacement
don't always fall within the accessibility
range of installed lifting equipment.
In that case, Systems Scaffold can be
configured to lift a center load of up to
3,750 lb and an off-center load of up to
1,875 lb.
Configuration involves adding a bearer/
runner, truss bearer, or I-beam to standard
Systems Scaffold. For lifting and horizontal
movement, Systems Scaffold can
be configured with header beams and an
underhung trolley I-beam between them
(Figure 5). Depending on the length, size,
and configuration of the beams, a trolley
I-beam can support loads of 1,250 lb to
10,000 lb. Trolley I-beams are available in
lengths from 5 ft. to 10 ft.
To shield technicians from " hot " pipes
(high-dose areas) during maintenance and
repair work, scaffold provides a means for
hanging lead-filled blankets. If a supply
of tube-and-clamp scaffold is stored in
the RCA on a semi-permanent basis (and
it often is), using scaffold to hang lead
blankets utilizes components already on
hand, a significant convenience compared
to fabricating a custom rack.
While lead plate can be used, lead wool
February 2017 | POWER
www.powermag.com
23
provides increased flexibility in handling.
Perimeter grommets-spaced every 12
inches-enable the blankets to be easily
affixed to scaffold with zip ties. The reduction
in dose rate varies from 20% to
31% depending on the thickness of the
lead wool blanket installed. Typically,
thicknesses ranging from 3/8 inch to 3/4
inch with densities of 10 lb/ft2
to 20 lb/ft2
are used. Stacking multiple blankets can
achieve a linear reduction in dose rates.
While lead is heavy, the load-bearing capabilities
of scaffold are well known and
easily calculated.
A good access provider will help the
contractor increase both safety and productivity
through outstanding planning,
engineering resources, on-site support,
and-most importantly-good communications.
■
-Darrell Domikos is director of national
equipment sales for Safway Group.
http://www.powermag.com

POWER February 2017

Table of Contents for the Digital Edition of POWER February 2017

Contents
POWER February 2017 - Cover1
POWER February 2017 - Cover2
POWER February 2017 - Contents
POWER February 2017 - 2
POWER February 2017 - 3
POWER February 2017 - 4
POWER February 2017 - 5
POWER February 2017 - 6
POWER February 2017 - 7
POWER February 2017 - 8
POWER February 2017 - 9
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POWER February 2017 - 31
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POWER February 2017 - 56
POWER February 2017 - Cover3
POWER February 2017 - Cover4
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