Hello
I have a glulam beam that has failed in bending-moment and deflection and I want to add a steel beam below to take up the slack. Do I distrubute the actions between the two baems in a ratio of their stiffness (EI) for both bending and deflection.
Thanks
Hello
I am trying to assess the stresses in a pier supporting a beam and attached is a pier.jpg showing the arrangement. The applied loads may be considerable so I need to get the stresses right.
I have a beam that is sitting on a padstone by 215mm with a triangular stress-block applied to...
Hello
I am being asked to provide the support for two beams that sit on a 215mm block wall. The wall itself is being built using 7N blocks laid on their side. To support the beams, I intend to strengthen the blocks under the supports. My question is - am I able to use C40 440x215x100mm...
Dear Engineers
I am designing a partial-depth end-plate for a beam that is double-notched and is carrying High Shear across the notched section and want to add a plate to the web of the supported beam to increase its cross-sectional area.
I am using the Eurocodes and the check I am performing...
Hello
I have moved some VBA from a Windows 7 machine running Excel 2007 onto a Windows 11 running Excel 2022. The code selects five sheets, one at a time, does some basic formatting and then exports the sheet to a folder called Output as a pdf. On the Win 7 machine, I use CutePDF to print; on...
Hi
I managed to delete all my named ranges in excel the other week and I am nearly finished locating and renaming the ranges - I had hundreds; fortunately, many are redundant now.
The problem I am finding is that after I have repaired the #NAME?, the #NAME? will not resolve itself until after...
Dear Forum
I have an excel workbook that refers to another workbook for data. This has worked for me for many years. Last week, I copied a sheet from a workbook that refers to the database to the database. The sheet was called MR. Things started happen in my other sheets and I traced the...
Dear Engineers.
I have calculated the bending-moments for a moment-resisting frame and now I want to calculate the sway. I have two 3m high columns with a 3m beam. Fixed base and a 2kN side thrust at beam level. Constant EI throughout. I have checked my calculations using SkyCiv frame-analysis...
Hello.
I am trying to understand the principles of sway of a column. The column is a fixed base cantilever with a heavy axial load and a wind-action as a point-load at the top of the column. No lateral UDL.
I have been doing the maths for the second-order analysis to calculate the sway...
I use Excel 2007 extensively. I write VBA every day and I particularly like the 2007 VBA programming environment, it is far better than the open-office variant (still doesn't stop me using open-office - excellent program - merge pdf's without adobe). I have just bought a new PC running Windows...
Hello
I have steel-frame that has to support some insulation and PV panels. The PV panels experience wind-load so push the frame. To analyse the frame, I used the moment area method. I have completed the analysis and the problem I am having is that I do not trust the results. I am getting a...
I want to remove the ground-floor section of a rear-elevation wall of a two-storey house and fit some bi-fold doors. Most of the wall is going so I need to prevent the building from swaying by using a moment-resisting steel-frame or goal-posts. The problem I am having is on how to assess the...
Hello
I am wanting to assess the moment on an internal pier caused through wind. I attach a picture of the problem below.
The pier (outlined red) is what remains of the rear wall of the house. Originally, this pier would have been 1400 mm deep but it has been reduced to 665 mm. I have...
Hello
I am working for an Architect who regularly takes out all the internal, and most of the external walls of a house and, on plan, the houses appear to be unstable. I am familiar with the notion of replacing the removed walls with a steel-frame or goal-post and I am OK with the frame...
Hello
I am trying to check a wall subject to wind load. The wall is part of a portal-frame warehouse and the masonry is restrained at each column, pinned at the top and dpc at the base. The panel is 4500 mm long and 3320 mm high. The wall was constructed in two parts. The first part is...
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I am sizing a flitch-beam and I want to know what yield stress to use for the steel. The steel-supplier quotes two figures for a 300x15 mm steel plate. The steel is S275JR and the minimum Yield is 275 N/sq.mm and a strength limit of 410-560 N/sq.mm.
Should I use 275 N/sq.mm or may I...
Hello
I want to check the strength and serviceability of a concrete raft foundation. The raft is bascically a reinforced concrete ring-beam supporting a reinforced concrete slab.
Given the ground supporting the raft may move due to tree-roots, how should I apply my loading onto the ground...
Hello
I want to confirm the Warping and Torsion constants for a double channel (Please see jpg's). Sorry about the scale of the images.
The formulae I have used I obtained from the "P385-Torsion.indb - Sci_p385" publication.
For the Warping Constant, I used AutoCAD to calculate the "Moments...
Hello
I am wanting to check the size of a flitch beam. 2 no. 220x45 mm C24 and 200x10 mm S275 plate - 3m long. Generally, I size the beam using the Transformed Section method, transforming the steel to timber. I would normally do my calculations by hand but thought it might be good to...
I work on drawings prepared by others. At the moment, I XREF the drawings into my own template and I have my Layers and Filters set to my preferences. However, I have to edit the XREF and create my own layers and filters within the other drawing - every time - twice a day. I want to export my...
