## 1 Introduction
Alternatively, wind pressure can be calculated at locations at any height, or a constant value of wind pressure calculated for the highest point on the structure can be assumed. The resultant wind load acting on a structure is the sum of the loads on the individual components. In the case when the direction of the wind is not parallel to the longitudinal axis of the component or frame surface, the magnitude of the aerodynamic force is estimated with the use of the following expression:  
\[F=A\cdot p\cdot C_{f}\cdot sin^{2}\theta, \tag{2}\]  
in which \(\theta\) is the angle between the wind direction and the longitudinal axis or surface (\(\theta<90^{\circ}\)). However, it should be stressed that the approach presented in the mentioned standards could be inadequate compared to real-life conditions. This is mainly due to different additional phenomena like vibrations, interference with the neighboring buildings and structures, etc. Therefore, works that report the results of the measured wind conditions performed on real-scale structures are very important [20; 21; 22]. Next, these results are the basis for creating appropriate conditions in the aerodynamic tunnels, where the scaled models or parts of real-scale structures are investigated [23; 24; 25; 26]. The rapid evolution of finite element software enables performing numerical analyses of more and more complicated problems which concern the phenomena of the airflow around and through crane-like engineering structures for different wind profiles [27; 28; 29]. Further mechanical analysis is possible when the distribution of the wind-induced load on the analyzed structure is available. Finally, the displacement or stress distribution in the most important nodes of the structure can be estimated [30]. However, other approaches in computer science are also developed to determine the stability margin during lift operations, for example, [PERSON] [31]. [PERSON] et al. [32] proposed and designed an active system of actuators and sensors for the mitigation of the dangerous effects of wind on the crane. [PERSON] et al. [33] prepared a mathematical model for the evaluation of the wind coefficients for the tower crane. As mentioned above, a particularly dangerous situation is when a sudden gust of wind acts on the crane structure with a payload during the operation service, for example, as demonstrated by [PERSON] et al. [34] and [PERSON] et al. [35; 36]. The direct motivation for this work is the below-described accidents. It is worth noting that the wind damage, primarily involving cranes being blown along rails, is the highest damage cost. For example, in the accident at the LNG gas terminal in Swinoujscie (Poland) in 2017 [37], not only the crane was damaged but also the critical infrastructure in the immediate vicinity. The dome of the eastern gas tank and a section of the pipeline were damaged. An example of a gantry crane accident with a box girder, which was destroyed due to exceptionally high wind, is a large gantry crane at the Damen ship repair yard in Schiedam, near Rotterdam, The Netherlands, in 2018 [38]. According to media information, the crane was properly secured, but one side of the crane began moving, causing a twist that broke the girder away from its supports. Witnesses to this event claim that the high winds may have created a localized tornado effect. Another accident involves the case of the gantry crane with a truss girder described in the work of [PERSON] [13]. In the present work, two kinds of gantry cranes are studied: a gantry with a box girder and a gantry with a truss girder. For both structures, we prepared the scaled sectional models of the main horizontal girders (box girder and truss girder). Next, we performed experimental tests in the aerodynamic tunnel to estimate the horizontal and vertical aerodynamic coefficients of these models. The results of these tests were exploited to verify these results, which were obtained from CFD simulations.