different external factors in their exploitation are 
examined. In this section the measurement of three 
different types of bridges will be presented / 11 /. 
The first bridge was loaded by different vertical 
weights and the vertical vectors of deformations by 
time-parallaxes method were determined. The successive 
photographs were taken from the same camera stations 
and differences in their angleorientations in the 
process of calculation were established. The measu 
rement of the deformations of bridge was performed 
simultaneonsly by Physical method. The comparison 
of the results has indicated the accuracy of vertical 
diplacements - 0.8 mm. In the second bridge /suspen 
sion/ the moves of the cables caused by variable flow 
of crude ail in pipeline were determined. The succe 
ssive convergent photographs were taken from cameras 
located on she riversides. The deformations of ropes 
were obtained by analytical method with accuracy ca 
1-2 cm. 
To determine the dynamical deformations of railway 
bridge the set of film camera and theodolit, which 
magnifyed the focus length of camera 30 times» was 
used. Successive states of bridge be time parallaxes 
method were obtained with the accuracy - 1 mm. 
The main advantage of the utilization of photo- 
grammetry in this type of applications is the possi 
bility of recording arbitrarily short states of con 
struction during its exploitation. 
2*3* Control measurement of the products 
The purpose of these measurements is control of 
the accomplishment of technical•assumption relative 
to the shape of products and fitting of cooperated 
Parts of product. In this field two experiments will 
be presented. First, the measurement of the shape of 
prefabricated wall products / 1 / and second, the deter 
mination of the shape of contact surfaces of coopera 
ted ship segments /2/. For this purpose, convergent