What is seismic braces?
What is seismic braces?
[¦sīz·mik ′brās·iŋ] (engineering) Reinforcement added to a structure to prevent collapse or deformation of building elements as a result of earthquakes.
What is a seismic hanger?
The BreakAway Hanger is an engineered release mechanism for the Fireloop®/seismic expansion joint. It releases the seismic joint to move through its full rated motion during a seismic event. The preset load is typically 1.4-1.5 times the static weight of the Fireloop® seismic expansion joint.
What is seismic support?
The core purpose of seismic bracing is to restrict horizontal shaking from an earthquake. All seismic braces firmly attach equipment to structural members of a building so that they move with the structure during an earthquake.
How much weight can a gripple hold?
Gripple hangers are load rated from 25 – 750 lbs per hanger, are pull tested, and have up to a 5:1 safety factors. You are hanging Spiral Duct from metal decking using a standard Gripple hanger with a 90° 3/8” eyelet hole, hanging 10 feet from the deck and need to meet a 200 lb weight rating.
Are seismic restraints required?
Seismic restraints are not required: In seismic design category D, E or F with a component importance factor of 1.5, for pipes of a nominal size of 1-in. or less. In seismic design category D, E or F with a component importance factor of 1.0, for pipes of a nominal size of 3-in. or less.
Why is seismic bracing used?
We offer a pre-engineered, time-saving solution which braces and secures non-structural equipment within a building to minimise damage from earthquakes or seismic events.
What is a rod stiffener?
Hanger rod stiffeners are used to prevent the buckling of the hanger rods under the compressive reaction loads during an earthquake. It occurs in long slender structural members under compressive load, and it occurs at loads far less than those required to yield the material in the structural member.
How do I lower my gripple?
How to Use
- Insert one wire into each end of Gripple.
- To tighten, for best results use Gripple Tensioning Tool and follow instructions with tool.
- To change or remove Gripple, release the holding mechanism by inserting a small nail into tiny hole above large hole.
How do you install Gripple wire?
1. Pull the nylon wire from the centre of the reel and feed through any support vine eyes, before the final vine eye simply thread the nylon wire through one of the large holes in the Gripple tensioner. 2. Pass nylon wire through the end vine eye and then back through the second large hole of the Gripple tensioner.
What is seismic importance factor?
The Importance Factor is a multiplier that increases or decreases the base design loads. Typically, the base design loads are outlined by the code as a 2% annual probability of exceedence (2% in 50 years for seismic loads).
