FAQs

 

 

 

 

 

 

 

 

Does Gripple provide engineering services?

Gripple provides full engineering services, including PE stamped drawings, BIM modeling and clash detection, coordination and site reviews, and budget estimating, as well as all of the seismic bracing and isolation products your project requires.  We will work with the engineer and contractor to provide the most effective bracing and restraint solutions, providing you with complete beginning-to-end seismic services.

What comprises a “Gripple® Seismic Bracing System” kit?

Specific sizes of kits are available, each with a different Load and Resistance Factor Design (LRFD).  GS10 = 350 lbs, GS12 = 1,050 lbs, GS19 = 2,100 lbs, and GS25 = 3,850 lbs.  Kit components include: a length of cable with a pre-attached end fitting, a color-coded tag indicating the brace size, a bracket for attachment to the hanger rod, and a Gripple® Seismic fastener.  Component descriptions are as follows:

  • Cable – 5/64″ (GS10), 1/8″ (GS12), 3/16″ (GS19), and 1/4″ (GS25) break strength certified, pre-stretched Gripple® Seismic cable in 10ft, 15ft, or 20ft lengths, manufactured to ASTM A1023 and ASTM A931.
  • Color Coded Tag – For attachment to cable, providing easy identification and assurance from the ground that the proper size brace has been installed.  Red = GS10, Green = GS12, Yellow = GS19, and Purple = GS25.
  • End Fitting – Pre-attached to the cable for attachment to ceiling anchor point, consisting of either a 45° Eyelet, Standard Single Bracket, or Standard Double Bracket, each with various hole sizes.
  • Bracket – Standard or Retrofit loose bracket versions are available, with various hole sizes, for attachment to threaded rod supports.
  • Fastener - Secures the cable after it has passed through the bracket: GS10 has a design strength (LRFD) of 350 lbs, GS12 has a design strength (LRFD) of 1,050 lbs, GS19 has a design strength (LRFD) of 2,100 lbs, and GS25 has a design strength (LRFD) of 3,850 lbs.

Can Gripple® Seismic bracing systems be used on retrofit installations?

Yes, Gripple® Seismic bracing systems are designed to brace nonstructural equipment and components on both new or retrofit installations.

What tools and preparation are needed to install Gripple® Seismic Bracing Systems?

Gripple® Seismic Bracing Systems are complete pre-engineered systems, requiring no tools or field swaging of cables. As a result, the kits are up to 10 times faster to install than other bracing systems. Because of the larger brace size however, it is recommended that the Gripple Tensioning Tool be used to pretension GS19 and GS25 cable brace installations to 110 lbs (50 kg setting on tool).

What are the different bracing methods Gripple® Seismic can be used for?

Gripple® Seismic Bracing Systems can be used for Transverse, Longitudinal, and 4-Way bracing methods.

What testing and certifications has Gripple® Seismic undergone?

  • OSHPD – California Office of Statewide Health Planning & Development – After extensive testing and qualifications, Gripple® Seismic has received OSHPD approval for Fixed Equipment Anchorage, and has been assigned OPA-2123-10 for their GS10, GS12, and GS19 cable bracing systems.
  • UL NEBS GR 63 Core Certification – Based on surpassing extensive shaker table testing requirements, Gripple® Seismic is the only seismic bracing company to hold this certification for its cable braces.
  • SMACNA Verification (Sheet Metal and Air Conditioning Contractors National Association) – As an acceptable alternative for seismic hanger bracing in strict accordance with the ANSI / SMACNA Seismic Restraint Manual – Guidelines for Mechanical Systems
  • Others – Gripple® Seismic has undergone all of the proper qualifications and necessary strength testing to meet any seismic design code requirements for their cable braces, including: International Building Code (IBC), California State Building Code, National Fire Protection Association (NFPA), American Society of Civil Engineers (ASCE) 7-05 Chapter 13, Unified Facilities Criteria (UFC) 300 and 400, American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE), and Federal Emergency Management Agency (FEMA).
  • In addition, VIMCO vibration and noise isolation products have been tested in accordance with the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) Standard 171 2008 guidelines for Method of Testing Seismic Restraint Devices for HVAC&R Equipment.

What is the difference between “structural” and “nonstructural” components?

Structural components include roofs, floors, beams, columns, foundations concrete or masonry walls…basically anything integral to the structure itself. Nonstructural components include architectural elements, mechanical and electrical equipment and supplies, life-safety systems, and other building contents (furniture, production equipment, etc.). Nonstructural components are critical for the proper functioning of a building after an earthquake, and bracing these components ensures reduction in life-safety risk to building occupants. Gripple® Seismic products and engineering services are targeted to nonstructural components and equipment.

Who determines the requirements for Nonstructural Seismic Design on a job?

The 2009 IBC (International Building Code) Section 1613.1 dictates that “Every stucture and portion therof, including nonstructural components…shall be designed…for earthquake motions in accordance with ASCE 7.” ASCE / SEI 7-05 Chapter 13 specifically details the “Seismic Design Requirements for Nonstructural Components” including:

  • Seismic Design Category / Occupancy Category
  • Component Importance Factor
  • Exemptions
  • Requirements for Designated Seismic Systems
  • Force / Displacement Equations
  • Anchorage