Ester Tower in Jerusalem, Israel

Customer Project

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

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

Česká Skalice, Czech Republic

Maik Engineers Ltd.

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

All timber, steel and membrane components of the structure have been prefabricated in the Czech Republic and sent to Israel in two twelve-meter 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 horizontal position, including the spiral stairway inside the wooden supporting cuboid.


The tower is anchored to the reinforced concrete foundation slab supported by four piles, each with a diameter of 35 cm and a length of 7 m, bored mainly in rocky subsoil. The lookout tower consists of two main mutually acting structural systems. Four supporting timber columns (28 × 28 cm - GL28h) which are set in the axial distance of 2.3 m form the load-bearing core with the height of 12 m.

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

Above the viewing platform, the facade structure is ended by 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 the ETFE foil. The designers have excellent experience with these membranes from the project of the airship “Gulliver” for the Centre for Contemporary Art in Prague.

The Czech-Israeli project of the architect Martin Rajniš in the magic city of Jerusalem can serve as a means of expressing the traditionally good relations between both countries.

Contact us

Contact to Dlubal

Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.

+49 9673 9203 0

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM Steel and Aluminium Structures

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RFEM Timber Structures
RF-TIMBER Pro 5.xx

Add-on Module

Timber design according to Eurocode 5, SIA 265 and/or DIN 1052

Price of First License
1,120.00 USD
RFEM Connections
RF-JOINTS Timber - Steel to Timber 5.xx

Add-on Module

Design of indirect timber connections with dowel-type fasteners and steel plates according to NDS and Eurocode 5

Price of First License
850.00 USD
RFEM Tensile Membrane Structures

Add-on Module

Form-finding of tensile membrane and cable structures

Price of First License
1,750.00 USD
RFEM Other

Add-on Module

Stability analysis according to the eigenvalue method

Price of First License
1,030.00 USD