Anchor Bolts EEJaime (Electrical) 8 Aug 09 18:18 When in doubt, just take the next small step. I generally find these have less problems then chemical anchors due to the fact that a tradesmen not a labour has to install, due to the use of a torque wrench. They are also more expensive generally, and have a lag time on ordering. These are good for situation where loading is required almost immediately after installation, However as noted by msquared48 these anchors can have problems with cyclic loadings, and to minimise the effect of this they generally have a torque that must be applied to ensure no movement during loading. What you are referring to is a mechanical post installed anchor. I also have a question regarding cast-in anchors, what is the standard tolerance provided in connection? I generally aim for +/-40mm, what does everyone else aim for?

However, if you only have say 3-10 chemical anchors onsite, enforcing this spec is impossible. I require a certification of installation to the hilti/ramset guidelines (This has the added advantage ensuring the anchor is installed by a tradesmen not a labour), Plus proof loading for minimum 5% selected by myself (I would say at random, But I do like to select ones that are in heavy tension). Anchor Bolts slickdeals (Structural) 8 Aug 09 17:52 I was just curious and thought I would ask an oponion of the experts. Perhaps not being structural myself, I've misunderstood the message in this thread. The Office of Statewide Health Planning and Development and The Division of the State Architect's Structural Engineers as well as our in-house Structural Engineers favor these. I've got thousands of these things installed. My switchgear, generator, transformer, conduit trapeze, and all manner of equipment anchorage specifications and details have called for these for many years. I was curious as to the discussion regarding post installed bolts did not include these? Are these too expensive for residential construction? Or is there another reason?

I am sure you are familiar with this or something like it. These are an afterset anchor but it does not use epoxy. It is almost a given that the Hilti 'Kwik-bolt III' will appear on all of our work. They have many pre-approved systems that are used for many types of equipment anchorage. Our anchorage and seismic bracing details are reviewed by the State and Local Agencies and we utilize a lot of Hilti equipment. We do Healthcare, Civic and Educational projects. I am coming from the Electrical side of building construction.

Hilti anchors with epoxy