The Association for Preservation Technology International (APTI) and Vertical Access LLC were awarded funds from NCPTT for a research program investigating mechanical anchor strength in stone masonry.

As part of this research, we are attempting to determine the design considerations that structural engineers consider when specifying post-installed anchors in natural stone. We would appreciate your participation.

Your answers will only be tabulated to calculate the averages and ranges of answers and will not be directly associated with your company or person.

      

If you were designing a small sign anchor or scaffolding tie back in Sandstone or Limestone, what would value you use for the allowable design strengths in tension and shear for a mechanical anchor with the following information:
* Assume the following published ultimate strength values in concrete (based on pre-selected embedment depth and anchor diameter).  
* Assume the typical design factor of safety in concrete is 4.0.
* Assume ultimate and design values in stone are not available and the project budget can not support in-situ testing of anchors.
Design Strength in Tension - Sandstone (lbs.)
Design Strength in Shear - Sandstone (lbs.)
Design Strength in Tension - Limestone (lbs.)
Design Strength in Shear - Limestone (lbs.)
If you'd like to stay informed about the progress of this research, including notices of papers and presentations, let us know who you are:
First Name
Last Name
Title
Email Address
Company Name
  
Copyright 2003, Vertical Access