I am being asked to form an opening in an existing masonry shear wall. I am interested in the effect of this on the in-plane behaviour - with small window openings the wall can still be considered to be a single wall when calculating the racking resistance. However, as the openings get larger it...
The use of rectangular steel picture frames is common when forming openings in existing masonry walls. I would be interested to hear what deflection criteria people adopt when designing these given there will be deflection of both the top and bottom beams within the frame?
I am carrying out a vibration assessment of a concrete floor in a laboratory building. Certain areas of the facility are to achieve the vc-b criteria which is defined in terms of a limiting rms velocity for any given one-third octave band between 0-80Hz. The building is currently under design...
I am currently designing a piled raft which for a number of reasons will be poured in 2 stages. An initial 1.5m thick pour and then a second 0.9m thick pour on top. I would expect there will be a time gap of 4 weeks or so between the lower and upper pour. The top of the lower pour will be...
