Tag
#construction
13 topics across all disciplines.
Plot plan and equipment spacing — the drawing everything else inherits
What actually sets the distance between equipment, the four drivers that pull against each other, the pipe rack as the spine and how its tiers are allocated, prevailing wind and fired equipment, roads and containment, and why a plot plan mistake cannot be recovered downstream.
From isometric to installed line — fabrication, erection and testing
How to read a piping isometric, why spool breaks decide what happens in the shop and what happens at height, and the test and reinstatement sequence that gets a line handed over.
Erection sequence and constructability — why the isometric order is not the build order
Why the number on an isometric says nothing about what has to be built first, how access is lost and regained, the dependencies that decide a piping sequence, and the habit of working backwards from the date that cannot move rather than forwards from today.
Spool handling and temporary support — the hours between landed and supported
The period in which a spool has been released by the crane but does not yet have the supports it was designed to have, why that state has no design behind it, what has to be established before the hook comes off, and why Friday afternoon is when pipe ends up on the floor.
Lift plans and rigging basics — sling angle, centre of gravity, and the reasons to stop
What a lift plan has to state before anybody touches a spool, why the tension in a sling leg is not the load divided by the number of legs, how an offset centre of gravity behaves, and the short list of conditions under which a supervisor stops a lift regardless of who is waiting.
Scaffold access and handover tags — access as a scheduled resource
Why access is a resource with dates rather than a condition of the site, what a scaffold tag actually certifies and what it does not permit, why an untagged scaffold is a red one, and the load class that stacking materials quietly exceeds.
Tie-ins and shutdown windows — preparing for the hours that cannot be extended
Why a tie-in window is the only genuinely fixed date on a project, what must be complete before it opens, why a trial fit is the highest-value hour on the job, what actually causes a window to overrun, and how to decide in advance what will be cut if it slips.
Diameter-inch and progress measurement — the unit piping is paid in
What a diameter-inch is and how it is counted, why it under-represents small bore, the difference between claimed and earned progress, the measurement rule that has to be agreed before work starts, and why the last ten per cent of a piping package takes months.
Construction productivity factors — why the same weld takes three times as long
Why a norm measured in the shop does not survive contact with a live unit, the conditions that multiply the hours without changing the work, crew composition and what a waiting welder costs, and the difference between a crew that is busy and a crew that is producing.
Supervising under a permit — the shift you signed for
Not what a permit is, which is covered elsewhere and free, but what changes when you are the person who signed it — what to verify at the work rather than on the form, the conditions routinely accepted and not met, why a gas test expires, and what handing back actually requires.
Site records and the daily diary — writing for somebody who will not believe you
Why the site diary is the most valuable document a supervisor produces, what distinguishes an entry that is evidence from one that is worthless, what to record every day regardless, and why contemporaneous matters more than detailed.
Variations, backcharges and notice — the difference between noticing and notifying
How to recognise an instruction that is really a variation, why the entitlement usually depends on the notice rather than the change, what a backcharge is and how it runs in both directions, and the one-sentence note that protects a position without starting an argument.
Underground services and excavation — the part of the plant nobody can see
What is buried under a plant and how it is protected, why trench collapse is the hazard that kills, and why backfill compaction decides whether a road is still level in ten years.