Each mast consisted of one 15' section with a diameter of 3'6", fifteen sections at 10' long with a diameter of 2' 6", thirteen sections at 10' long and 2'0", one reducing section at 5' long and a diameter that tapers from 3'6" to 2'6" and one 5' long section with a diameter that tapers from 2'6" to 2'0" Note: Pictured above is one of the 10 foot sections. This is on display outside of the Admiralty House Museum and Archive.
The steel foundation to which the mast would be secured. The plate is secured to the concrete foundation block of the mast by means of twelve holding down bolts which pass through twelve anchor plates embedded in to the concrete foundation block.
Having completed the first section, it was necessary to finish off the base structure that held the mast. The foundation had to be leveled off with concrete to its required height and the foundation plates had to be grouted in. Those in charge of pouring the concrete were instructed to make sure that no dirt came between the old and new layers of concrete which could possibly compromise the strength of the structure.
A cage was then attached around the mast and suspended from the erecting head. Four worm gear pulley blocks connected to the cage allowed the cage to be moved 25 feet up or down the mast, equivalent to two mast sections. During the time when the topmast was being raised, the cage would be secured to the topmast by means of chain slings to help eliminate the possibility of the cages being damaged.
Half-circle steel plates used to hold together the ends of the individual mast sections. Each mast section had a set of these plates connected to both ends. Holes located on the circumference of the plates allowed bolts to pass through and connect plates to one another. The diameter of the plates was the same as the diameter of the mast section it was connected to.
Originally an order to "haul yards," these two words were corrupted into one which now designates any lines used for hoisting sails, flags, etc.
Fid: A piece of iron or wood used for fidding the topmasts and topgallent-mast when swayed up to keep them in place. Used to splice rope.
Fid hole: A hole cut in the topmast and the topgallent-mast. In regards to the masts at the H.M wireless station, bolts were inserted in to the fid holes rather than fids.
Located along each end (horizontal) and up either side (vertical) of the mast sections, it is the area in which bolts would be placed to secure sections together. An example of this can be seen by viewing the picture of the mast section outside the Admiralty House Museum located in the image index.
Four sets of stays were provided, each consisting of four stays. These stays would be connected to the mast, anchoring it to the ground preventing it from falling over. Until the permanent stays were in place, temporary stays were used during the erection of the masts to ensure the safety of the structure.
Once the erection of the mast was complete, it was time to deconstruct the erecting gear. The cage was shackled to the mast with chains and the topmast and the erecting head were unbuilt and lowered to the ground. It was devised that the topmast and erecting head be dismantled in three pieces. The main halyard bracket and sheave was fitted to the top of the mast allowing the cage to be unbolted and then lowered to the ground. In cases where the topmast and erecting head were not dismantled, the builders were instructed not to raise the topmast after the last two cylinders were erected and to leave the topmast and erecting head projecting 12 feet out from the mast.
Once erected, the winches were bolted down to the concrete foundations and they were then used for raising or lowering the aerials or main halyard.