Rex's first proper calculation: the crane pad for lifting the escalators in. Neat sums, tidy sketch, a little bit proud.
Show me your working
Rex's crane pad calculation is checked with a tick. The sums are perfect. The numbers going in aren't.
The wrong way
Stevie's on leave. A busy engineer flicks through it in the corridor. Tick. "Checked."
The escalator weight came from an escalator schedule in an old folder, C01. C03 swapped them for heavier ones.
The crane is on site, hired by the day, and not cheap.
The lift supervisor reads the weight off the delivery note. "That's not what your calc says." The lift is stopped.
The pad is redesigned and the crane goes home. Stevie, back from leave, reads the calc. "Your sums are perfect, Rex. It's the numbers going in."
The tick said "checked". Nobody had checked what went in.
Find out what Stevie should have doneStevie's Lesson 5 · Show me your working, then the same story done the right way.