huangyhg

hilti anchors vs. anchor bolts
i know that hilti makes a wide selection of different anchor systems. it seems that the traditional anchor bolts have been the design choice for all types of construction.
when it comes to residential, would you consider using hilti anchors for anchoring the column baseplates to the supporting footing pads or are the traditional anchor bolts better for that? how about anchoring the sill plate to the foundation wall?
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both can be acceptable if designed properly. i will generally allow for drilled and epoxied anchors for columns and sill plates. the size and embed depth will vary depending on the loads and conditions.
as h57 stated both are acceptable if designed properly. as for drilled and epoxy, i spech out the hilti epoxy but just give the grade of anchor so customer has option to compare pricing between different anchor suppliers.
i wish hilti and other manufacturers had never invented the epoxy and adhesive anchors.
check the manufacgturer's fine print closely, as some afterset anchors are not suitable for vibratory loads, including seismic loads.
mike mccann
mmc engineering
archeng59,
while i do agree these anchors are heavily over used onsite, they are very good option for cyclic/fatigue load conditions like wind, if you have to use a post-installed option. i like cast-in anchors the most.
i do not like to use mechanical anchors in wind applications due to the displacement in the concrete required to get ultimate strength conditions, and since you often have alternating loading conditions (ie tension to compression) mechanical anchors if loading past slip condition will fail very quickly.

when in doubt, just take the next small step.

with good workmanship cast-in anchors are preferred however we do get phone calls from builders who don't get them in the right position and then we have to go with the post-installed anchor option.
archeng59,
please enlarge on your earlier comment. why do you wish there were no epoxy or adhesive anchors?
ba
ok, i see now. what are some of the reasons for choosing the use a grouted base plate over a plate resting directly on a footing pad?
the grouted baseplate allows the g.c. to get it level to accept the column. rarely is the top of a footing level enough to accept a column properly.
grout also allows for minor adjustment of elevation.
ba

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