December 29, 2020

Diagonally Reinforced Concrete Coupling Beams with Grade 120 (830) High-Strength Steel Bars

By: Shahedreen Ameen, Remy Lequesne, Andres Lepage

Four large-scale coupling beams were tested under fully reversed cyclic loads to investigate the effects on behavior of diagonal bar grade (60 or 120 [420 or 830]), beam shear stress (9.5 or 14√fc′, psi [0.79 or 1.17√fc′,...

November 10, 2020

CFRP Pipe Repair: How To Ensure Success

CFRP pipe lining has proven to be a valuable piping repair technology. Compared to conventional excavation-type repairs, it requires less excavation and disruption to above-ground operations, as well as shorter time out of service. However,...

September 2, 2020

Sub-Slab Drainage Systems

Many buildings have enclosed below-grade spaces, which can either be exposed to permanent, temporary, or perched groundwater conditions.  Typically, these groundwater elevations fluctuate several feet, if not more, due to precipitation or...

August 18, 2020

CIPP for Tomorrow: What Is Needed?

By: Murat Engindeniz, Michael Gipsov

Washington Suburban Sanitary Commission (WSSC Water), one of the largest users of carbon fiber reinforced polymer (CFRP) liners for large diameter pressure pipe, is considering expanding its use of FRP liners to include small diameter pressure...

August 18, 2020

Uncertainty Quantification of the Structural Capacity of Pipelines Using Separation of Variables Methodology

Evaluation of pipeline infrastructure system resilience requires an understanding of pipeline risk of failure. Current methods for pipeline risk assessment are largely deterministic, and as such, do not explicitly represent the effect of...

August 6, 2020

Overcladding Strategies for Institutional Buildings

By: Michael Chafetz, Douglas Pac

Building façades require upkeep and repair over time. These repairs can often be costly and disruptive to operations and occupants. Overcladding is one method that can be implemented to renew or upgrade the exterior façade while allowing the...

July 15, 2020

Interlaboratory Study of the Standard Test Method for Evaluating Bond of Seven-wire Steel Prestressing Strand

By: Ashwin Poudel, Rémy D. Lequesne, William N. Collins, Enrico Lucon, David Darwin
An interlaboratory study involving 19 laboratories was conducted to quantify the precision of ASTM A1061-16.
July 7, 2020

New IBC Rules for Insulation in Unvented Enclosed Roof Framing Assemblies

The 2015 version of the International Building Code includes new provisions that relate to unvented enclosed rafter/truss assemblies and unvented attics, which dictate how design professionals specify vapor retarders and placement of insulation in compact roof assemblies for moisture control.
June 19, 2020

Best Practices for Designing Smoke Control Systems

By incorporating NFPA 92 with best practices, fire protection engineers can successfully design smoke control systems for buildings.
school with tornado damage
June 2, 2020

Storm Shelter Design Guidance for K-12 Schools

In recent years, the International Building Code (IBC) has mandated that all new construction for K-12 schools in most of the Midwest and South Central United States include a community storm shelter. It is important for community officials and project team members to understand these requirements and follow best practices for designing these critical structures.