anchor type
anchor type
(OP)
seems everybody has an opinion on which type of anchor is best
epoxy threaded or unthreaded rod
vs
mechanical - undercut / cone and sleeve expansion
I'm looking for pros and cons of each type for:
tensile stress
shear stress
under water
in older concrete, cracked vs uncracked
installed in drilled hole (core drill vs percussion drill)
some vibration
cold water temperature
epoxy threaded or unthreaded rod
vs
mechanical - undercut / cone and sleeve expansion
I'm looking for pros and cons of each type for:
tensile stress
shear stress
under water
in older concrete, cracked vs uncracked
installed in drilled hole (core drill vs percussion drill)
some vibration
cold water temperature






RE: anchor type
RE: anchor type
underwater installation
existing concrete
drilled holes, probably diamond cored
temporary, low tensile stress
reducing to no tensile stress and very low /occasional shear over the design life
1" carbon steel anchor
epoxy are more difficult to install underwater
temperatures are low
mechanical is easier to install underwater
but there is a "feeling they could come loose"
RE: anchor type
I would not use a diamond coring bit to drill the hole. It makes the hole too smooth. Use a carbide bit.
Clean the hole, with or without epoxy. Use an anchor that is longer (more embedment) than your load will dictate.
RE: anchor type
RE: anchor type
RE: anchor type
I think they are called plugs at that depth!
EIT
www.HowToEngineer.com
RE: anchor type
inadequate cleaning of holes
incorrect epoxy
no epoxy
oil on the bolts
insufficient FS
cold temperatures
holes too large
epoxy not mixed properly
etc.
largely a failure due to inadequate design, construction and inspection...
RE: anchor type
RE: anchor type
Dik