Abstract: A method is shown for measuring the utilization of the load carrying capacity of a building structural element subject to variable action, including measurements of the rotation angles of cross-sections of this building structural element, wherein the rotation is caused by the variable action, wherein the rotation angles ?1 and ?2 of the cross-sections of the building structural element around the axis (Z) perpendicular to the longitudinal section of this building structural element are measured in two points (A) and (B) of this building structural element, located symmetrically relative to its transverse axis of symmetry, and subsequently the greater of the measured values of the angles ?1 and ?2 is used as the measure of the utilization of the load carrying capacity of the building structural element.

Abstract: A method is shown for measuring the utilization of the load carrying capacity of a building structural element subject to variable action, including measurements of the rotation angles of cross-sections of this building structural element, wherein the rotation is caused by the variable action, wherein the rotation angles ?1 and ?2 of the cross-sections of the building structural element around the axis (Z) perpendicular to the longitudinal section of this building structural element are measured in two points (A) and (B) of this building structural element, located symmetrically relative to its transverse axis of symmetry, and subsequently the greater of the measured values of the angles ?1 and ?2 is used as the measure of the utilization of the load carrying capacity of the building structural element.

Abstract: A method of vertical displacement measurement of structural elements of a building, includes the placing of a measuring target for a laser beam, with the target inclined at an angle ? from horizontal, placing a laser rangefinder for measuring an inclination angle ? of the laser beam, emitting the laser beam at the angle ? to hit the target and reflect back, measuring the distance from the laser rangefinder to the target, wherein the inclination angle ? of the target is saved, followed by measuring at two time points t1 and t2 the distances from the rangefinder to the target, equal to b1 and b2, respectively, and at the same time points measuring the angle of inclination, ?1 and ?2, respectively, of the laser beam, followed by calculating the value of vertical displacement vd of the target relative to the rangefinder, which occurred between time points t2 and t1.

Abstract: The invention relates to a monitoring method of vertical displacement of selected points of building construction elements, especially roof construction elements or their parts, and vertical deflection change in these points, wherein a distance, preferably vertical, between each of monitored points of construction elements and the stable elements or stable floor is measured, and then a value of vertical displacement of each monitored point, which occurred from the moment of monitoring initiation, is calculated, and then for each monitored construction element the value of vertical deflection change in the monitored point is calculated. The invention relates also to a system for monitoring of vertical displacement of monitored points as well as vertical deflection change in these points of building construction elements.

Abstract: The invention relates to a monitoring method of vertical displacement of selected points of building construction elements, especially roof construction elements or their parts, and vertical deflection change in these points, wherein a distance, preferably vertical, between each of monitored points of construction elements and the stable elements or stable floor is measured, and then a value of vertical displacement of each monitored point, which occurred from the moment of monitoring initiation, is calculated, and then for each monitored construction element the value of vertical deflection change in the monitored point is calculated. The invention relates also to a system for monitoring of vertical displacement of monitored points as well as vertical deflection change in these points of building construction elements.

Abstract: The invention relates to the set for fastening of measuring device, particularly rangefinder, to the monitored element of building construction, especially of the roof, which includes an universal joint (1) and at least two fluidic dampers (2, 3) and an outer end (6) of the first shaft (4) of an universal joint is equipped with technical means for rigid connection to building construction element while an outer end (7) of the second shaft (5) is equipped with technical means for rigid connection to measuring device, and dampers are equipped at their both ends with technical means for swinging connection of these ends to building construction element or to the measuring device or to an universal joint shafts. The invention relates also to the fastening method of measuring device by means of a fastening set and suspension containing a fastening set.