Author Archives: dougaj4

Time in hours and minutes between two dates

Posted on 30/09/2018 by dougaj4

Dates and times in Excel are stored as a date number, which is the number of days since 1 January 1900, with the value after the decimal point representing the time of day. To calculate the number of hours between … Continue reading →

Posted in Excel | Tagged , , , , | 7 Comments

New AS 3600 and RC Design Functions 8

Posted on 23/09/2018 by dougaj4

A revised version of the Australian Concrete Structures code, AS 3600, was recently published, with many significant changes, including: Changes to ULS reduction Factors Creep and shrinkage Curvature and deflection calculations Crack width calculation and stress limits Major  changes to … Continue reading →

Posted in Concrete, Newton, UDFs, VBA | Tagged , , , , , | 1 Comment

2 more Moves Through the Fair

Posted on 20/09/2018 by dougaj4

I have just mended a broken link in the previous installment of “She moves Through the Fair”. Here are two more, from Tir Eolas: and Tara McNeill:

Posted in Bach | Tagged , , | 2 Comments

Arc-spline update

Posted on 09/09/2018 by dougaj4

The input for the first version of the Arcspline function required the coordinates of the centre of each arc, as well as the angle of the tangents at each end of the arc.  I have now added a new version with … Continue reading →

Posted in Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | 7 Comments

Using Redim and 3DFrame

Posted on 31/08/2018 by dougaj4

I recently received a query about the 3DFrame spreadsheet failing to run.  The problem was that the code was trying to Redim an array that had not been previously created with a Dim statement.  This does not cause a problem … Continue reading →

Posted in Excel, Frame Analysis, VBA | Tagged , , , | 1 Comment