May 30, 2004

Slate and Clay Tile Roofing Defy Father Time

On older roofs, high-quality clay tile or natural slate frequently outlast the original metal flashings and roofing underlayment, for example, asphalt-saturated felt paper that help to make the roof watertight. The question frequently facing...

May 30, 2004

Leak-tracking techniques: how to find non-roof related leaks

Abstract: When is interior water damage not the result of a roof leak? Wall leaks, plumbing leaks, and condensation can be interpreted as coming from the roof. How do you find the source? Visual examinations of interior and exterior surfaces...

April 29, 2004

Design of Profile Wall Thermoplastic Pipe for Compression Forces

By: McGrath, Timothy J.

Abstract: Gravity flow thermoplastic pipes use profile wall geometries to provide maximum wall stiffness with minimum wall area. This practice minimizes the material used in manufacture, and thus the product cost. In the case of some...

April 29, 2004

Structural Design of Polypropylene Chambers Using Plastic Pipe Analysis, Design, and Test Methods

By: Jesse Beaver, McGrath, Timothy J., Phillip Sharff

Abstract: Plastic pipe has been used for many years in applications to control surface water runoff by detention, retention, and infiltration. Review of deficiencies with available pipe geometries resulted in creation of a new product,...

April 29, 2004

Evaluation of Stress Crack Resistance of Corrugated High Density Polyethylene Pipes

By: Hsuan Y.G., McGrath, Timothy J.

Abstract: As the use of corrugated high density polyethylene (HDPE) pipes increases in transportation applications, the requirements on their long-term properties becomes more rigorous. Recently, the Florida Department of Transportation required...

March 30, 2004

Effects of Reference Displacement and Damage Accumulation in Wood Shear Walls

By: Jeff Langlois, Gupta R., Miller T.

Abstract: The objectives of this study were: (1) to evaluate the effect of reference displacement on wall behavior under fully reversed cyclic loading using the Consortium of Universities for Research in Earthquake Engineering (CUREE) test...

March 30, 2004

Design of steel structures for blast-related progressive collapse resistance

By: Ronald Hamburger, Whittaker, Andrew

Abstract: Structural design of steel structures in buildings to resist the effects of potential blasts is discussed. Steel building systems are found to be ideal due to the toughness of structural steel as a material and the relative ease of...

February 27, 2004

Two-Dimensional Analysis of Thermoplastic Culvert Deformations and Strains

By: Dhar A.S., Moore I.D., Timothy J. McGrath

Abstract: Tests have been performed in a biaxial pipe test cell to develop baseline information on profiled pipe behavior under biaxial loading. These include a lined corrugated high-density polyethylene pipe and a helically wound ribbed...

January 30, 2004

Thrust Restraint Design of Concrete Pressure Pipe

Abstract: A finite-element model of a buried pipeline consisting of concrete pressure pipe segments and joints is developed for analysis of longitudinal effects resulting from pressure-induced thrust at a bend. The model accounts for longitudinal...

January 30, 2004

Rising to the Challenge: Roofing Rehabilitation of the New York State Capitol

By: Niklas Vigener, James Jamieson

Abstract: Consider a list of single conditions that can make any roofing project significantly more challenging:|- Complex roof geometries and conditions|- A plethora of different roofing materials|- Extremely steep roof slopes|- Difficult access...