Thanks to George, WB5VZL (geoiii@bga.com) for providing a copy of the original posting to the KA9FOX web site! From: "Mr. Brett Graham" Reply-To: "Mr. Brett Graham" To: cq-contest@tgv.com Subject: Re: setting pier pin for 45G Here in VS6, everything is concrete. Therefore, we have occasion to anchor things into the stuff... For minor stuff, expanding anchors will suffice. Since they'll never come out unless you chisel out the concrete around them, the stainless steel version is prefered. Waterprooofing hint: put some Araldite (an epoxy glue) in the hole before setting the anchor. As the anchor expands, it pushes the Araldite into all the voids that would otherwise retain water & eventually wick through the concrete. For any serious stuff - the pier pin for Rohn 45 would probably count - we use Hilti anchors. This company makes a literally dozens of different anchors for concrete. They have a whole series of chemical anchors which would be perfect for the application. They come with either a plated or stainless steel threaded rod & a glass epoxy-filled cartridge. Drill the hole, blow out the dust, drop in the cartridge, drive the rod in with a hammer to break the cartridge, attach drill chuck to end of rod & drive it home (which mixes the epoxy at the same time). About 20 minutes later, you have an anchor which is stronger than the concrete it's set in. A cartride & rod (non-stainless) costs about US$20 or so here in over-priced HK. Due to the abundance of concrete, Hilti actually has several of its own storefront outlets in town. So, I'd expect the volume about cancels the standard excessive mark-up & they should sell for approximately the same price in the States. One point I'd like to stress - the Hilti anchor is designed as a set. It's a special rod intended for the application - I WOULD NOT EVEN CONSIDER SETTING JUST ANY BOLT IN CONCRETE WITH EPOXY. QSL? 73, VS6BrettGraham aka VR2BG bagraham@hk.super.net