The article presents the results of validation of static calculations carried out for a monolithic rectangular tank with walls of trapezoidal cross-section. Static calculations were made with the use of software based on the finite element method (FEM) and the finite difference method (FDM) in terms of energy (including spatial static work of the tank). Validation of the results was conducted on a concrete tank model using an innovative measurement tool, i.e. a coordinate measuring arm with a touch probe.
 A. Halicka and D. Franczak, Design of Reinforced Concrete Tanks. Volume 1. Tanks for Bulk Materials, Wydawnictwo Naukowe PWN, Warszawa, (2014), [in Polish].
 PN-EN 1992‒1‒1:2008 Eurocode 2: Design of concrete structures. Part 1‒1: General rules and rules for buildings.
 W. Buczkowski, “Solution of beams of changeable rigidity with use of finite-difference method”, Acta Scientiarum Polonorum. Architectura 8(3‒4) (2009) [in Polish].
 FARO Edge and FARO Laser ScanArm Edge Manual. Faro (April 2016).
 Z. Kączkowski, Plates. Static Calculations, Arkady, Warszawa, 2000 [in Polish]
 J. Gołaś, Introduction to the Theory of Plates, Wydawnictwo Wyższej Szkoły Inżynierskiej, (1972), [in Polish].
 W. Buczkowski and H. Mikołajczak, “The application of finite difference method for static calculation of unusual, one-chamber rectangular tanks”, in Design and implementation technology of tanks, 31‒38, (1985), [in Polish].
 W. Buczkowski, “Reflections on static calculations for rectangular tanks”, Inżynieria i Budownictwo 3, 153‒154, (1997), [in Polish].
 W. Buczkowski and A. Szymczak-Graczyk, “The influence of different thickness and construction of walls on static works of monolithic rectangular tanks”, Acta Scientiarum Polonorum. Architectura 7(3) (2008) [in Polish].
 W. Buczkowski, A. Szymczak-Graczyk, and Z. Walczak, “The analysis of static works of closed monolithic rectangular tanks”. Durability and Repair of Building Structures, Dolnośląskie Wydawnictwo Edukacyjne, Wrocław, (2015).
 R. Paruch, “Computer-aided design with the use of Robot Structural Analysis in terms of BIM”, Mechanik 7 (2015) [in Polish].
 A. Halicka and D. Franczak, “Design of reinforced concrete tanks. Tom 2. Tanks for liquids”, Wydawnictwo Naukowe PWN, Warszawa, (2014), [in Polish].
 T. Błaszczyński, M. Babiak, and P. Wielentejczyk, “The use of numerical methods for the analysis of damage caused by fire in the biomass silo”, Materiały Budowlane 9 (2015), [in Polish].
 M. Sybis, A. Smoczkiewicz-Wojciechowska, and A. Szymczak-Graczyk, “The analysis of complexity of the finite difference method (FDM) and the finite element method (FEM) exemplified by a beam element”, Design, operation, diagnostics and repair of selected structures of general and hydro-technical construction, Institute of Civil and Geoengineering, Poznań University of Life Sciences, Poznań, (2015), [in Polish].
 E. Ratajczyk, “Coordinate measurement arms for industrial applications”, Pomiary, Automatyka, Robotyka 3 (2012).
 E. Ratajczyk, “Measurement arms – scanning and special measurements, measurements in an extended range, software”, Mechanik 1 (2009) [in Polish].
 E. Ratajczyk, M. Rak, and T. Kowaluk, “The influence of the method for collecting points on results with the use of a measurement arm”, Metrology and Measurement Systems 3 (2012).
 Cam2 Measure 10. Manual v 10.7. Faro (February 2017).