Document ID: chunk:federal_register_of_legislation:F2021L01587:reg:7:p12
Version: federal_register_of_legislation:F2021L01587
Segment Type: reg
Provision Reference: reg 7 (pt 12/15)
Character Range: 147106–149854

(Synonym: gallery deck).
Balcony floor - Floor of the balcony. Eddystone Point Lighthouse balcony floor is constructed of stone slab.
Balcony balustrade - A handrail together with its supports. The supports are called balusters. A railing or wall on the outer perimeter of a balcony, to prevent people from falling off the balcony. Generally made of metal stanchions and rails – Eddystone Point's is made of wrought iron stanchions with four iron rod rails.

C
Chance Bros - English manufacturer of optical apparatus, lanterns, cast iron stairs, cast iron towers, and other lighthouse components. The Chance family established a glass- making business in Smethwick, England in 1824 and is often described as 'near Birmingham'. The business was absorbed into the Pilkington group of companies in 1951 and now ceases to exist.

E
External catwalk - A landing around the external face of the tower complete with hand rail.

I
Intermediate floors - Levels found mid-way up a building.  Eddystone Point's intermediate floor is composed of slate floor on riveted composite iron beams built into tower walls.
Internal catwalk - An open landing inside the tower complete with handrail. Eddystone Point's internal catwalk is composed of cast iron lattice floor panels supported on solid cast iron brackets bolted to the upper section of the lantern base.

L
Lantern - The glazed enclosure at the top of a lighthouse,  which surrounds and protects the optical apparatus. It contains the optical apparatus, made up of the lantern roof, lantern glazing and murette sections.
Lantern floor - The level in a lighthouse at which the lantern is installed, and by which access may be gained to the optical system and to the inside and outside of the lantern glazing. The lantern floor is generally at or near the same level as the catwalk and can be made from steel, concrete, or timber. Eddystone Point's lantern floor is composed of slate slabs supported on rolled iron I section beams built into the tower walls.
Lantern glazing - The middle section of the lantern, circular or polygonal in plan, between the lantern roof above and the   lantern base below, made up of glass panes held in a framework of glazing bars. On the landward side there may be blank panels in place of glass, or other opaque construction. Types of lantern glazing include: flat and curved trapezoidal panes and curved diamond/triangular panes. Eddystone Point has trapezoidal panes.
Lantern roof - Roof of the lantern. Usually made of copper sheeting over a framework of rafters. Eddystone Point's lantern roof is composed of copper sheeting.
Lens assembly - A transparent optically refracting element of glass. The surface is usually spherical in form.
Light source - Electric lamps and