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Wood Attack
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Order Number
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Title
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Author
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Date
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Field Tests and Evaluation of Polychlorophenates in Cooling Tower (TRP-120)
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C.D. Carlson, Dow Chemical Company
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1962
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Abstract:
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Experience in Retarding Wood Rot by the Use of Plenum Chamber Sprays (TP-11A)
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Saul Kaye, Wright Chemical Corporation
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1964
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Abstract:
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Fire Retardant Treated Wood For Cooling Tower Construction (TP-80A)
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Ralph H. Bescher, Koppers Company, Inc.
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1970
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Abstract:
It is not unusual for a catastrophe in a totally unrelated area to
have a marked effect upon the future of one's own industry. Could
it be that the Bel Air conflagration in Southern California will have
an effect upon the future construction of cooling towers? That fire
did have an effect upon the insurance industry and they wrote a
performance requirement for the fire proofing of cedar shingles and
shakes. Several chemical manufacturers picked up this challenge and
the net result was the development of leach resistant fire retardant
treatment for wood used in wet applications. The physical
characteristics of wood treated with NON-COM EXTERIOR will be
discussed including the effect on strength, corrosion, decay
resistance, Underwriters' Laboratories, Inc.'s fire tests and
labeling, and the probability of meeting building codes and insurance
regulations with regard to fire in various types of cooling towers.
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Environmental Impact of Chemicals Washed From Preservative-Treated Wood (TP-147A)
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J.R. DeMonbrun, Union Carbide Corporation
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1976
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Abstract:
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Preservative Treatment of Cooling Tower Lumber a State-of-the-Art Report (TP-181A)
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David Hutton, P.E., BAC- Pritchard, Inc.
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1978
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Abstract:
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The Effects of Hot Water Exposure on the Strength and Stiffness of Douglas-Fir and Redwood (TP-264A)
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John A. Nelson & Robert W. Petterson, The Marley Cooling Company
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1983
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Abstract:
Modulus of elasticity and compression parallel to grain have
been determined on small clear and full sized samples of Douglas
Fir and Redwood after three year wet exposures at room
temperature, 120°F and 150°F. Determinations have been
made at room temperature and at the temperature at which the
samples were exposed. The results of the tests have been used to
generate reduction factors to be applied to the properties
tested.
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Cooling Tower Wood Decay Identification, Current Incidence, and Control Methods (TP-84-10)
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Paul R. Puckorius, Puckorius and Associates, Inc.
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1984
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Abstract:
How to identify decay in wood cooling tower. Where it occurs,
what it looks like and how to determine if it is in you tower. A
review of the incidence in Douglas fir "treated" lumber, and how
it can be controlled before and after the tower is assembled.
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Cooling Tower Wood Sampling and Analyses: A Case Study (TP-85-10)
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J.L. Haymore, Martin Marietta Energy Systems, Inc.
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1985
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Abstract:
Extensive wood sampling and analyses programs were initiated on
crossflow and counterflow cooling towers that have been in
service since 1951 and 1955, respectively. Wood samples were
taken from all areas of the towers and were subjected to
biological, chemical and physical tests. The tests and results
for the analyses are discussed. The results indicate the degree
of wood deterioration, and areas of the towers that experience
the most advanced degree of degradation.
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Cooling Tower Wood Decay Prelimitary Survey Results and Conclusions (TP-85-19)
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Paul R. Puckorius, Puckorius and Associates, Inc.
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1985
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Abstract:
Up-to-date results on Survey of Incidence of Wood Decay in
Cooling Towers-a follow up of technical paper presented at
February 1984 Annual CTI Meeting.
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Identification of Cooling Tower Wood Attack and Methods of Control (TP-86-10)
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P. Song & Michael G. Trulear Nalco Chemical Company
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1986
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Abstract:
Biological and chemical attack can greatly accelerate the
deterioration of cooling tower wood. The damage, once inflicted,
is irreversible and often results in premature and costly wood
replacement. Biological attack is the more serious type of
attack and is difficult to detect. Control of each type is
essential for good tower maintenance. A review of wood
structures, types of attack and methods for control are
presented. Effects of alkaline cooling water operation on wood
deterioration are also discussed.
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Wood Preservation and How It Pertains to the Cooling Tower Industry
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Darrell R. Smith, Conrad Wood Preserving Co., Jeffrey J. Morrell, Oregon State
University
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1996
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Abstract:
The proposed presentation would center on proper wood treatment
of wood members that are destined for the harsh environment of
the Cooling Tower Industry. The program would include: 1) Wood
species and their treat ability 2) Preparation of the wood
products before treatment a) Incising type and description b)
Moisture content c) Stress reduction 3) Treatment techniques a)
Waterborne preservatives b) Procedures 4) Post treatment 5)
Handling and storing of treated products.
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Creosote Revisited
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James L. Willa, Willa, Inc.
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1998
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Abstract:
The ten-year field study by CTI to evaluate the best lumber and
chemical pressure preservative pretreatment for cooling tower
construction, conclusively proved that creosote redwood was
essentially the same as Acid Copper Chromate (ACC) treated
redwood, and better than another lumber and preservative
treatment such as Chromated Copper Arsenate (CCA). However,
premium labor costs for handling creosote caused it to fall from
favor. This paper reviews this situation in view of the
continuing difficulty in obtaining proper penetration of the
recommended salt treatments. It includes two specific case
studies of creosote cooling towers in the Gulf Coast area.
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Evaluation of a Simplified Procedure to Determine the Condition of Wood Cooling Tower Components.
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Matthew E. Anderson, Wood Advisory Services, Inc and Yelena S. Golod, BEC
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2002
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Abstract:
This study was conducted in a effort to evaluate a simplified
procedure for determining the condition of structural members in
a wood cooling tower. Shutdown periods for inspections are
costly and often only a short time period is available. The
simplified awl penetration test commonly used by contractors
during inspections of wood cooling towers would be more reliable
if penetration data were correlated to mechanical properties.
For this study, an awl test was conducted and mechanical
properties were evaluated for wood removed from a cooling tower.
Significant reductions in mechanical properties were found and
consistent relationships between awl penetration and mechanical
properties were observed. The use of an awl for inspections with
quantifiable residual strength results appears to be promising,
however, further testing should be conducted to verify an expand
the results found in this study.
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