| UNAVCO
 


5/8" Stainless Steel All-thread Mast Overview

5/8" Stainless Steel All-thread Mast

Back to comparison table
Mount Commonly Used
Stability
Cost
Install Time
Labor
Substrate
Site Impact

Cup with brass adapter

med-high

$30

1 hr

1
BR, R

low

The 5/8" stainless steel all-thread mast is the simplest of the monumentation supported by UNAVCO. The monument consists of one length of 5/8" stainless steel all-thread, which can be cut to size in the field. The mast is set directly into a hard substrate. The mast is installed as close to vertical as possible; a stainless steel cup with a threaded brass adapter is generally used for the antenna mount, as shown here. The cup does not allow for precise leveling but does allow for the antenna to be oriented to north. These monuments are used throughout the semi-permanent GNSS network in Bangladesh and in Calabria, Italy (both M. Steckler, Lamont-Doherty Earth Observatory).


GNSS site in the Bangladesh network.

Pros

  • Inexpensive (e.g. ~$30 for the all-thread, $50 for the mount)

  • Can be installed with a battery-powered drill

  • Small footprint, low-profile

  • Short installation time (<1 hr)

  • Materials readily available; no custom machining necessary for the monument

  • Can be installed on a rooftop or other stone or cement structure

Cons

  • Can only be installed in solid material

Design and Construction

A battery-powered drill is all that is needed for installation of the mast.

Documents

None.

Installation Photos

Mladen Nedimovic of Dalhousie University and Michael Steckler of the Lamont-Doherty Earth Observatory install a monument on the roof of a church in the Calabria region of Italy.

Approximate Cost

$30 (not including epoxy or cement)

This cost is for the monumentation only; the antenna mount is not included.

Materials

  • custom length of 5/8" stainless steel all-thread

  • epoxy or quick-setting, expansive concrete

  • stainless steel nut and washer for locking position of the antenna or antenna mount

  • Loctite or other glue for threads (optional)

Tools

  • battery-powered drill

  • tube to blow rock flour out of the hole

  • level

  • compass

Mount Commonly Used

A 5/8" threaded leveling mount can be used, but we commonly use a simple non-leveling mount consisting of a stainless steel cup holding a brass adapter. The antenna is screwed onto the brass adapter and can be rotated to north. The adapter is then held in place in the cup with a set screw. The monument itself is installed as close to vertical as possible.

Attached Files
There are no attachments for this article.
Comments (2)
Comment by Frederick Blume on Thu, Nov 29th, 2012 at 2:55 PM
We have these custom machined at McRoberts Machine Inc. (http://www.mcrobertsmachine.com) in Longmont, CO.
Comment by CESAR NEGRON on Thu, Nov 29th, 2012 at 2:19 PM
where i can find this 5/8" threaded leveling mount
Name
Email
Security Code Security Code
Related Articles RSS Feed
How to install a polar-style GPS antenna mast
Viewed 38636 times since Mon, Dec 1, 2008
Polar Mast Overview
Viewed 11000 times since Fri, Feb 19, 2010
Stainless Steel Pin with Mast Overview
Viewed 49402 times since Thu, Feb 18, 2010
Monument Pins Overview
Viewed 13007 times since Fri, Feb 19, 2010
IVTRAN Monuments
Viewed 1737 times since Tue, Sep 15, 2009
Shallow Foundation Mast Overview
Viewed 12511 times since Thu, May 3, 2012
Dimpled Monument Pin ("Bevis pin")
Viewed 1301 times since Tue, Sep 15, 2009
Threaded Monument Pin (Conquest Pin) (diagram)
Viewed 25042 times since Tue, Sep 15, 2009
Deep Foundation Mast Overview
Viewed 398 times since Fri, Jun 26, 2009
MENU

Last modified: Monday, 12-May-2014 00:18:29 UTC