How a flagpole works: halyard, truck, counterweight and hinge

A flagpole is a simple machine: a rope running over a pulley. Most of what makes one pole easier or safer to use than another comes down to how that rope runs, how it is held, and how the flag is changed. This guide explains the mechanics and how they relate to the way the National Flag is hoisted and lowered in Ireland.

Halyard and truck

The flag is attached to a rope called the halyard. It runs from the bottom of the pole up to the truck, the fitting at the top with a pulley, and back down again, forming a loop. Pulling one side raises the flag; pulling the other lowers it. At the top, a finial caps the pole. Many trucks rotate, so the flag can turn with the wind without wrapping around the pole.

The flag is fixed to the halyard by its finish: a rope loop and tail, or brass rings on the hoist side, attached with clips or toggles.

External halyard

On an external system, the halyard runs on the outside of the pole and is tied off around a cleat low on the pole. It is simple to use and to repair, and the rope is easy to replace. According to FlagPoles Ireland, a Dublin supplier, an external halyard works well at homes or at business parks where there are no children around or the premises are locked at night. The rope can bang against the pole in the wind.

Internal halyard

On an internal system, the halyard runs inside the pole and is reached through a lockable door at the base. A counterweight, fitted either to the bottom of the flag or to the end of the rope, keeps the halyard taut. FlagPoles Ireland recommends internal systems mainly for health and safety, and calls them anti-vandal, since the rope cannot be cut and the flag cannot easily be stolen. At schools, where pupils often raise the flag in the morning and lower it in the afternoon, the supplier compares the need for an internal halyard to the rules for cords on classroom blinds. The counterweight can bang against the inside of the pole in the wind.

Sleeved and hinged bases

How the pole is fixed at the base affects how the flag and the fittings are reached:

• a sleeved pole stands in a ground sleeve in the foundation and is lifted out for major work
• a hinged-base pole pivots at the base and can be lowered to the ground, so flags and banner arms are changed with the pole lying flat, with a controlled pivot up and down

According to FlagPoles Ireland, hinged-base poles are common where flags are changed often, such as at motor dealerships.

Hoisting and lowering

The guidelines of the Department of the Taoiseach describe how the National Flag is handled on the pole:

On ceremonial occasions, those present face the flag and stand to attention while it is hoisted or lowered. More in the guides to half-mast and flag flying rules.

One flag per pole

FlagPoles Ireland states that its flagpoles are designed for one flag per pole. Chaining several flags together on a taller pole stresses the pole, can break it and voids the warranty; the manufacturer can tell the cause of a break from the pattern of the glass fibres. The guidelines add their own rule: no flag or pennant is flown above the National Flag.

Weather

The supplier notes that the wind at the top of the pole is a great deal stronger than at ground level, and that a wet flag weighs about three to four times as much as a dry one. It advises against flying flags in strong winds or rain and never in force 7 or above, and states that flags are removed when there is a wind alert, as its warranty otherwise lapses. More in the guide to flagpole safety.

When something stops working

A halyard that jams, a truck that no longer turns or a door that will not open are the most common problems. According to FlagPoles Ireland, dirt and grime collect in the halyard system over time and can eventually make it jam. The parts are described in the guide to flagpole accessories, and faults in the guide to flagpole repair.