Overall, for typical UFC explosive weights I and II with conventional standoff distances, the
SlenderWall system performs well. The analysis included herein show that the SlenderWall
performs well for a representative blast load application. A summary table of the component
response is seen below.
The total end reaction at the connections to the structure is approximately 15,000 lb.
Nelson stud spacing shall be determined on a case-by-case basis, depending on the blast
requirement, final panel configurations and light gauge stud spacing for the project under
consideration. Localized punching shear at the Nelson studs must be analyzed to ensure the
panels satisfy both the initial blast as well any rebound requirement, if applicable.
For the case study noted in this report, the Nelson stud anchor spacing would need to be less than
the standard 24 inches o.c. If the designers wish to maintain the standard 24-inch Nelson stud
spacing, another option would be to insert 1 ¼ inch square plastic shims at each Nelson stud to
reduce the effects of localized punching shear. The designer should evaluate each project
separately to determine which of these options is the most economical option.
This report presented a simplified analysis of a given panel geometry using simplified models for
the purpose of estimating global response and identifying potential failure modes. Future studies
could be performed using Finite Element Analysis or explosive testing to determine system
responses that simplified methods would be less likely to predict. However, it should be noted
that the methods used in this report are the same methods commonly utilized on façade design
for both precast and curtain wall systems.
As is true with any blast-rated building, the Design Team must evaluate each project on a caseby-
case basis. Factors such as stand-off, building configuration and panel geometry may all need
to be factored in to the blast response evaluation.
Under the blast conditions analyzed in this report, the Slenderwall panels performed remarkably
well. The global response of the system indicates that the Slenderwall panel system is an
extremely viable option when a moderate level blast design of the façade is required. The results
of the analysis demonstrate the global response of the system, which confirm that the overall
system performs satisfactorily and may be used in blast applications.