A thin-webbed welded steel plate girder (h/t = 370:1) was tested up to an average shear stress of 13 ksi, or three times the Timoshenko critical load. Local yielding occurred during the initial loading, but subsequent performance was elastic. Strains were recorded in two panels (d/h = 0.5) subjected to combined shear and bending, and in the adjacent stiffeners and flanges.

It is normal practice for civil engineers designing steel beams and columns to assume that the joints are free to rotate, unless they are especially designed as "fixed" joints, in which case it is assumed rotation is completely prevented. In actual fact, however, the joints are semi-rigid. Some rotation does take place, but this rotation is resisted by the joint and creates bending moment at the ends of the beam. The relationship between the joint rotation and bending moment cannot, as yet, be determined theoretically.

Fourteen rectangular reinforced concrete beams with the same dimensions and varying amounts of vertical stirrups were tested for ultimate shear strength. The beams were symmetrically loaded at the third points of a central span with a loaded overhang at each end to simulate the effects of continuity. A study of the cracking pattern, the deflected form of each beam and the stresses in the main and web reinforcements was made. The results were compared to both code requirements and theories presented by other investigators. As a result of this study it is shown that the strength of beams in shear can only be increased by shear reinforcement up to a limiting value. A modified hypothesis, as an explanation for the mechanism of shear failure, is presented.

This investigation deals with the behavior of a simply supported 8WF17 beam, fifteen feet long, commonly used as a spandrel when a plate is welded to the bottom flange to carry the eccentric wall. The test was conducted at three torques equivalent to a two, four, and six inch brick wall ten feet high resting eccentrically on the bottom plate producing bending and large torsional stresses. Pairs of stiffeners were bolted to the beam at the fifth, quarter, third, and centre points and the effects on the angle of twist, flange, and web stresses studied. The change in position of the neutral plane was also examined. The observed test data was compared with the theoretical based on the Lyse-Johnston, and Grinter methods of design. The experiment stopped after permanent yielding occurred in the web and a kink developed in the top flange.

Throughout the ages the various types of architecture or mans way of materially expressing the thoughts, and the ways of living of his age, have been curtailed by the available materials and inherited techniques. Wood was one of the first universal building materials. It was readily attacked by the elements and the buildings as well as the culture of the times was soon lost to history. With the advent of stone a permanent building material was available to the builders and sculptures of the day.

Concrete work during cold weather is normally avoided by the construction industry. The reasons for this can be grouped under two general headings; firstly, the poorer working conditions which prevail and secondly, the effect which a low ambient temperature has on the strength of freshly poured concrete. The lower standard of working conditions in winter are due mainly to snow, the fewer hours of daylight available and the heavy clothing worn and personal discomfort experienced by the workers. These factors result in added cost due to snow removal, artificial lighting and a decrease in output of the labour force.

This study investigates the shearing strength of two types of soil as determined by the unconfined compression test and the double ring shear test, together with the stress-strain modulus as determined from the slope of the unconfined compression curve. Laboratory investigations were conducted on loosely compacted sand samples, dense sand samples and clay samples, all of which were cured and tested under two temperature conditions - 0°F. and 24°F. Both fast and slow unconfined compression tests were conducted at these two temperatures.

Moment rotation characteristics are obtained for a standard web connection for a 12 inch deep beam using high tensile bolts. Variables were 1) initial pre-tension 2) thickness of angle 3) ratio moment shear. The results obtained are compared with existing information. The rotation is found to be due to angle deformation and column deformation. The effect or the column flange stiffness on the connection characteristics are analyzed. The effect of the history of the connection is shown also. The determination or pre-tension in the bolts is described as well as the complete instrumentation and behaviour during test.

The objective of the investigation was to establish the hydrologic regime of the drainage basin of the Lake Hertel giving proper considerations to the various phases of the hydrologic cycle. Constructional features included two measuring weirs for inflow to and a measuring weir for outflow from the Lake. Installation of a class "A" evaporation pan with all instrumentations were done to register all parameters to compute water surface evaporation. These were compared with results from empirical formulae. Comparative calculations concerning applicability of meteorological data of McGill University and St. Hubert Air Base meteorological stations were made. Rainfall - runoff relations were analysed measuring inflow by the two measuring weirs taking into account base flow and surface runoff. From such observational findings the derivation of a runoff coefficient for this area was aimed at. Complete computations for all phases of the analysis were tabulated in the text of the thesis.

The importance of study of super-critical flow in open channels is recognized by present day hydraulic engineers. The subject is so vast and the mechanics of such flow is so complex that in spite of considerable work having been done in this field during the past twenty years, the final word has still to be said, especially regarding the beat remedial measures available. The writer found an article "Model Study Aids Designers of Spillway for Lyman Run Dam" in September 1951 issue of "Civil Engineering".