The Marley Difference – Structural Connections – Shear Plates
Shear plates increase the load-bearing capability of joints in wood structures by increasing the bearing area. In addition, properly designed shear plates provide joint stability even if the bolted connection becomes loose because of wood shrinkage or minor movement between the members making up the joint.
The Marley Difference – Structural Connections – Splices
Cooling towers are typically of a size which necessitates splicing many of the structural members. Inattention to an appropriate design standard, and failure to exercise a consistent structural philosophy, can produce splices that will become failure points in the future.
The Marley Difference – Crossflow Performance
All components used in Marley crossflow cooling towers have been rigorously tested at SPX's industry leading Research and Development Center as a system, in the configurations in which they are actually used.
The Marley Difference – Wood Design Standards
The basic design of timber structures is governed by the National Design Specification for Wood Construction (NDS), published by the American Forest and Paper Association. Cooling towers, however, are subjected to a uniquely harsh operating environment, as well as dynamic forces that dictate structural concerns somewhat beyond accepted norms.
The Marley Difference – SystemConnect Inlet
Want better choices in layout and piping connections for your cooling tower? The Marley SystemConnect Inlet system gives you more choices to make your layout of the NC cooling tower both expedient and economical.
The Marley Difference – Counterflow Performance
Experience has shown that cookbook combinations of laboratory component data do not yield expected results in full scale performance. In order to develop valid cooling tower performance prediction, experience in field testing a variety of tower configurations is essential.
The Marley Difference – Lumber
As lumber goes through cycles of alternate wetting and drying, the wood swells and shrinks twice as much along each growth ring as it does across growth rings. Internal stresses build up, making the board warp and twist. This problem becomes severe in boards containing heart centers.
The Marley Difference – Redwood Lumber Grades
While both appearance and structural grades of redwood lumber are defined by appearance or visual characteristics, they have very different applications. For cooling towers and other structural applications, grading rules for structural grades of redwood establish requirements for strength characteristics such as slope of grain, knot size and frequency, and rate of growth.
The Marley Difference – Pressure Treatment
Lumber used in cooling tower construction must be treated with a reliable preservative compound to prevent decay. The industry's current preferred treating chemical is Chromated Copper Arsenate (CCA), a waterborne formulation which prevents biological attack by fungi or other microbes. Other preservatives are also available.
