these are the bolts we use when anchoring to concrete: https://www.hilti.com/anchor-fasteners/expansion-anchors/r2813
you can also use these if it's a smaller mount: https://www.hilti.com/content/hilti/W1/US/en/services/fastners---firestop---strut/concrete-anchors/kwik-bolts.html On Thu, Aug 16, 2018 at 2:51 PM, Colin Stanners <[email protected]> wrote: > So our amateur radio "Wi-Fi" (+similar protocols) group has gotten access > to the roof of a large building where we plan to install mounts outside the > walls of the concrete-walled elevator shack for our smaller antennas. > > We have heavy-duty mounts - http://www.ventevinfra.com/sho > p/files/products/towers--site-hardwareb/mounting-solutions/ > Universal%20Wall%20Mount%20Series.pdf - and I've done this quite a bit at > work for smaller antennas (1ft-2ft dishes). But at this site we have > another ham group that wishes to install a massive antenna, a 20ft long > vertical omni. > > Does anyone know if having the above pair of mounts lag-bolted (2 inches > deep?) into concrete is strong enough to guarantee no issues with that huge > antenna, or would we need to drill through the concrete and put a plate on > the other side instead? > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > >
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