ANTENNA MAST & MAST SUPPORT PRODUCTS NEEDED
- 1.9” OD GALVANIZED FENCE RAIL
This is a common material used by fence companies for railings and posts. The 1.9” OD is the actual size though the industry nominal size is 1-1/2” to 1-7/8”?. It can come in several different wall thicknesses which can add extra strength and rigidity to your mast. Some of the wall thicknesses are 0.065”, 0.090”, 0.109”, and 0.120”. I’m using the 0.090” thickness. Of these, the 0.065” is the lightest duty and is the thinnest wall that should be used. The 1.9” comes in lengths usually over 20′ long, so cutting or delivery arrangements have to be planned ahead. Five foot lengths are the best for our install because they are the optimal length to be used with the DIY ‘Winch-It-Up’ Mast Support described in another link here. Other sources of 1.9” galvanized pipe besides fence companies could be local steel companies, internet metal suppliers and local salvage yards. This website DOES NOT supply 1.9” mast material.
- 1.740” OD EMT (ELECTRICAL METAL TUBING – INDUSTRY SIZE 1-1/2”)
This is a 16 gauge wall (0.065”) that is galvanized on the outside and coated on the inside. It is the same or heavier gauge than the common telescopic mast. It provides excellent results when installed properly. It is readily available from local home supply stores in 10 foot lengths.
NOTE: Due to both steel manufacturers’ allowable ID and OD tolerances for these products, the fit with the Bend-Gard® Coupler will be close but not perfect. There can be a small amount of free play, say 0.005-.010” +/-. That’s not much and as you raise your mast and put weight on it, it won’t be noticeable nor affect your install.
BEND-GARD® brand Couplers are made from thick walled DOM steel (yield point around 70,000 psi) then cut into 8” lengths, machined, then zinc spray painted for corrosion protection. Their purpose is to couple together and reinforce the 5′ pieces of mast material being used for the antenna mast system. In its finished form, the beveled version might be called a ‘No Hang-Up’ Coupler that will quite easily pass through your standoff brackets. Try that with clamping devices. Click ‘Purchase Options’ for details.
So, what you have to do is drill the 5/16” holes in the 5′ sections of 1.9” OD galvanized fence rail mast (industry size 1-1/2 or 1-7/8?) or the 1.740” OD EMT (industry size 1-1/2”), assemble with the Coupler and raise. Click on the ‘Prepare/Raise Mast’ link for details.
You can purchase your Couplers from this website in your choice of options for either of the two mast material options. The two sizes are not interchangeable with each other.
GUY RING RETAINER (GRR)
The Guy Ring Retainer acts as the stop for the mast’s top guy ring. On lower levels, the Coupler acts as the stop, so usually you need only one GRR per install. In its’ final form it’s about one inch wide, is drilled and tapped through one wall then zinc plated and/or zinc spray painted. It is secured with a 5/16-18 x 1” stainless steel pan head bolt.
You can purchase them through this site though they are manufactured by Max-Gain Systems, Inc. (www.mgs4u.com). You will use only one part number for your mast size-either GR-175 for the EMT mast or GR-2 for the 1.9” OD mast. You will need several of these depending on the mast height and where sections are to be guyed. Our price is the same as posted by Max-Gain Systems and we can include them in your BEND-GARD® order without adding to your shipping costs. We carry only one color. NOTE: These guy rings are designed to be used with ROPE GUYS ONLY. Do NOT use with metal guy wire or any abrasive material.
GUY ROPES & TIGHTENERS
See the ‘NOTES’ link for types used. Availability is as noted.
Commercially made standoffs are available online. Make sure what you purchase can handle at least a 2-1/2” mast. Even then you will have to remove the front bracket strap for the guy rings to clear it. See the ‘Notes’ link for detailed information.
‘WINCH-IT-UP’ ANTENNA MAST SUPPORT
This is a DIY mast support made from 4×4 pressure treated beams. It uses two standoff brackets and a strap winch and is designed for using with 5′ sections of antenna mast. See ‘DIY Mast Support’ link for instructions.