Recent News

Keeping Coal Clean

This article details the background and construction of a coal storage circular dome for Indonesia’s largest fertilizer producer, PT Pupuk Kalimantan Timur (Pupuk-Kaltim). Geometrica was selected based on the company's ability to meet Pupuk-Kaltim's very specific logistical and environmental needs.

Corrosion Free Resistant Dome

Freedomes allow creativity, versatility and efficiency

Freedome® is Geometrica's trademark for free-style domes. These domes provide all the advantages of circular domes, but with a non-circular plan. Using the inherent strength of doubly curved surfaces Freedomes may clear spans up to 1000 ft (300m) and often are shaped to be the lightest structure to cover a specific free-form area. As circular domes, Freedomes may have lamella, kiewitt or lace in-surface pattern and single or double structural layers.


Domes are surfaces that curve in two directions. The most common domes spring from a circular base and for that we call them "circular domes" at Geometrica, even if their cross-section is not circular. So the term "circular dome" differentiates domes on a circular base from Freedomes® that spring from bases of other shapes.

Geometrica Vaults

Vaults are structures that span in one direction only, such as arches or longitudinal cylinders, also known as barrel vaults. Vault spans begin at around 40m and can reach over 100m. Geometrica vaults have been used as sports facilities, transportation terminals, aircraft hangars and for environmental protection.

Vault Construction

Space Frame

Many applications require roofs or covers that are flat, or nearly flat. Space frames provide efficient solutions for these requirements. The most common space frame geometries are called "offset rectangular grids", "square on square space frames", or simply "square grids".

Space Frame Structure

But square grids have a couple of characteristics that may limit their use for the longest spans:

Free-form structures

 Free-form structures and domes can be used to cover large expanses of space in a variety of venues. Arenas, atria, museums, houses of worship, and industrial buildings all require large covered areas without intermediate columns. In order to realize these large structures effectively, design professionals should shape these buildings to take advantage of form both as a structural element and for architectural expression.  But few construction systems allow full geometric freedom and economic efficiency. Until now.