Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Idioms, Wikipedia.



(in structural mechanics), force actions that produce changes in the stress-strain state of the components of buildings and structures. The following loads are distinguished according to the nature of their changes over time: static loads, whose place of application, direction, and intensity are assumed in calculations to be independent of time or to change so slowly that the resulting forces of inertia may be disregarded, and dynamic loads, whose magnitude, direction, and site of application change so rapidly that forces of inertia must be taken into account in calculations.

Static loads are divided into constant (or dead) loads, which in calculations of any given system are assumed to have constant action (the empty weight of structures, ground pressure, and so on), and intermittent (or live) loads, which may or may not be taken into account in calculations, depending on their significance for the structure in question. Intermittent loads are in turn divided into short-term traveling loads, which change their position (loads resulting from the congregation of people on the floors of buildings or from automobiles and trains on the spans of bridges), and long-term fixed loads (for example, the weight of stationary equipment and of racks and bins in warehouses).

The following loads are distinguished according to the nature of application to the body on which they act: concentrated loads, which are applied to a very small area (point), and spread loads, which are applied to an entire surface (line) or part of it. Spread loads are characterized by the intensity—that is, by the limiting ratio of the magnitude of the resultant load, distributed over a given surface or line, to the magnitude of the area or line on which it is acting, if the latter tends toward zero. A spread load of constant intensity is said to be uniformly spread. A spread load whose points of application occupy an entire surface or section is called a continuous, or distributed, load.

In calculations of structures by the method of limiting states, a distinction is made between rated loads, which are established by design standards and correspond to the conditions of normal use of the structure, and design loads, which are determined with reference to possible deviations from conditions of normal use of the structure. In cases of simultaneous action of several loads, the least favorable design load combination is determined; it corresponds to the critical value of the force or displacement arising in the elements of the structure or installation.


Stroitel’nye normy ipravila. Part 2, sect. A, ch. 11: “Nagruzki i vozdeistviia: Normy proektirovaniia.” Moscow, 1962.


References in classic literature ?
Half the load and twice the dogs, if they ever expected to reach Dawson, was what was said.
It took them half the night to pitch a slovenly camp, and half the morning to break that camp and get the sled loaded in fashion so slovenly that for the rest of the day they were occupied in stopping and rearranging the load.
And though they were making poor time, the heavy load they dragged sapped their strength severely.
She was pretty and soft, but she weighed one hundred and twenty pounds--a lusty last straw to the load dragged by the weak and starving animals.
An hour's time saw the sled loaded with the ingoing mail and grub, fresh dogs harnessed, and a fresh Indian engaged.
The oldest generation of electronic loads is based on the switching of resistive components.
Ye, "Effects of mixed erosion, freeze-thaw cycles, and persistent loads on behavior of reinforced concrete beams," Journal of Cold Regions Engineering, vol.
This book explains the snow load provisions in Minimum Design Loads and Associated Criteria for Buildings and Other Structures, Standard ASCE/SEI 7-16, published by the American Society of Civil Engineers.
In most applications, UPS allow loads to operate without a break during a power outage and are considered critical to business continuity.
The researchers focused on pairs of CD4 counts and viral loads measured between 60 and 365 days apart.
On Page 41 of PS 731 (Oct 13), we said that FM 4-20.198, Multiservice Helicopter Sling Load: Single-Point Load Rigging Procedures and FM 4-20.199, Multiservice Helicopter Sling Load Dual-Point Load Rigging Procedures, hadn't been converted to TMs.