Ester Tower in Jerusalem, Israel

Structures Analysed with Dlubal Software

  • Customer Project

Customer Project

A wooden lookout tower called Ester, designed by renowned Czech architect Martin Rajniš, was inaugurated in Jerusalem in mid-November 2017. The tower, in the shape of a blooming cactus, is located in the gardens of a former hospital built in 1887, not far from the walls of the Old City, offering visitors a spectacular view over Jerusalem. It offers visitors a spectacular view over Jerusalem.

Structural Analysis TIMBER DESIGN s.r.o.
Ing. Zbyněk Šrůtek (timber, steel, ETFE membrane)
Česká Skalice, Czech Republic
www.timberdesign.cz

Prof. Dipl-Ing Michal Bar Ilan (Foundations)
Israel
Architects Prof. Ing. arch. Martin Rajniš, Ing. arch. Tomáš Kosnar
Prague, Czech Republic
hutarchitektury.cz
Main Contractors Huť architektury Martin Rajniš s.r.o.
Prague, Czech Republic
hutarchitektury.cz

TIMBER DESIGN s.r.o.
Česká Skalice, Czech Republic
www.timberdesign.cz

Maik Engineers Ltd.
Israel

Model

All timber, steel, and membrane components of the structure were prefabricated in the Czech Republic and sent to Israel in two 39-foot containers. All components were fabricated in high quality, using both CNC technology and handicraft. This quality standard was an essential prerequisite for the successful and quick assembly in Israel.

All prefabricated components were assembled in a horizontal position, including the spiral stairway inside the wooden supporting cuboid.

Structure

The tower is anchored to the reinforced concrete foundation slab supported by four piles, each with a diameter of 14 inches and a length of 23 ft, bored mainly in rocky subsoil. The lookout tower consists of two main mutually acting structural systems. The 39.4-foot-high load-bearing main core is formed by four load-bearing main timber columns (11 × 11 inches - GL28h), which are set up at a center distance of 7.5 ft.

The basic framework is followed by the second structural system, forming the external shape of the tower. The cactus shape is achieved with an octagonal prism. All structural components are designed in a way so that it is possible to replace them with a new component at any time.

Above the viewing platform, the facade structure ends with a dome with a central steel ring gathering eight steel beams. The roof structure is designed in combination with the hot-dipped galvanized steel supporting frame and a special membrane made of ETFE foil. The designers have excellent experience with these membranes from the project of the “Gulliver” airship for the Center for Contemporary Art in Prague.

The Czech-Israeli project by the architect Martin Rajniš in the magical city of Jerusalem can serve as a symbolic expression of the traditionally good relations between the two countries.

Project Location

Gdalyahu Alon St 14,
Jerusalem
Israel

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  • Updated 11 April 2022

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