Domical-type structure

DETAILED DESCRIPTION OF THE INVENTION The four basic structural units of the invention used in constructing the domical structure can be designated as A, B, C and D as shown in FIG.
3.
Each basic unit is an isosceles triangle having having outer and inner surfaces, a predetermined thickness and predetermined lengths for the equal and third sides.
Each side edge of the units is bevelled or angled inwardly from the outer surface and this edge angle is predetermined for each of the basic units, the purpose being that abutting or adjacent units in the upward curving structure of the dome will correctly mate together at the edge interfaces of each unit, whether they are the same basic unit or not.
As shown in FIG.
1, the domincal structure is constructed by erecting a first circular, substantially perpendicular tier or row of angularly abutting alternating upright A and inverted A units.
The upright units are secured to a ground level foundation of concrete or the like as will be described hereinafter.
Adjacent upright and inverted units are secured together along adjacent equal sides of the units.
The alternating upright and inverted A units angle inwardly and outwardly to a small degree around the circular row.
A second tier of alternating upright A units and inverted B units are installed with the angled third side of the upright A units of tier two abutting the angled third side of the inverted A units of the first tier.
The second tier is therefore canted inwardly from one an amount equal to the edge angle of unit A.
A third tier is similarly installed as the second tier comprising alternating upright B units and inverted C units with the angled third side of the upright B units of the third tier abutting the angled third side of the inverted B units of tier two.
The third tier is therefore also canted inwardly from tier two an amount equal to the edge angle of unit B.
The top of the domical structure is enclosed by installing a fourth tier of upright units D all angularly abutting each other along their equal sides to form a conical top with the apexes of each unit meeting at the top of the dome