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Summer 2013

Issue #11 

Summer 2013 Option1
eNews from CBI Consulting Inc.

Hello! ,

 

We hope that you are enjoying your summer!  June and July brought the heat and rain, and now August seems to be treating us well with comfortable, cooler, summer days.

 

In this newsletter you will find articles about the effects of 'rust jacking' and signs and damage control for wood deterioration.

 

If you have any comments or suggestions, please reply to this email or give us a call.

 

Michael S. Teller, AIA, NCARB, LEED AP BD+C

Wayne R. Lawson, PE, SECB

Craig E. Barnes, PE, SECB

& all the Architects and Engineers on staff at CBI

The Power of Rust

We have known for many years that as rust forms on metal installed in masonry or concrete, the rust expands up to seven times the original thickness of the metal.  The force of this expansion, if confined, can reach as high as 9,000psi.Rust Jacking     Contrast this to normal concrete which is only 3,000 or 4,000psi in compression and less than 1,000psi in tensile strength.  The effect of this rust expansion and its damage to structures is known as 'rust jacking.'

 

In concrete, reinforcing bars (rebar) which are cast too close to the surface are more affected by surface moisture and are more likely to rust.  As the rebar rusts, it expands causing the concrete to spall and cracks to form, which we are all familiar...Find out more.

Wood Deterioration

Timber is perhaps the oldest and most widely-used building material available.  It grows naturally and is renewable.  It can have great strength-to-weigh characteristics and it is easy to work with.  Unfortunately, like any naturally grown organic White rot.material, it decays naturally too.  There are an abundance of   organisms that feed on wood as part of the natural life cycle of the forest.  Wood that have been harvested and used for buildings will fall prey to these organisms if not properly protected.  On the other hand, wood that has been properly protected can remain sound for centuries. 
The primary factor separating sound wood from a pile of compost...Find out more.

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 Summer Tip 

 

Be proactive in recognizing that contractors may have fallen behind schedule due to this Summer's weather and request recovery schedules.

  

 Featured Project 

     

Barnstable Town Hall

Hyannis, MA  

 

CBI was retained by the Town of Barnstable, MA to inventory and report on the condition of five (5) historic municipal buildings, including the Town Hall in Hyannis.  The report's focus was to identify challenges to maintain and restore the historic character of the buildings including, but not limited to, identifying exterior rehabilitation, systems replacements, necessary MEP upgrades, and code and life safety requirements. 

The Barnstable Town Hall is a 3 1/2 story masonry Romanesque Revival...Find out more.

CBI Consulting Inc.

250 Dorchester Avenue

Boston, MA 02127

T (617) 268-8977

F (617) 464-2971

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