Cover & DurabilityWhy the last 30 mm sets the service life.Civil EngineeringDurability is set by the cover to the steel and by thepermeability of the concrete around it.Nominal cover = minimum cover + allowanceInternal and dryLeast cover neededMild exposure.Marine splash zoneMost cover, lowest w/cChloride attack.Carbonation reaches steelPassive layer breaksCorrosion follows.THE COMMON MISTAKETreating cover as a fixing toleranceCover is a design requirementCover protects steel from carbonation and chlorides and provides fireresistance. Shaving it on site shortens the life of the structure.Educational reference. Cover, exposure classes and w/c limits are codevalues, not decisions to be made on site.Cover & Durabilitylearnposters.com
Cover & Durability — printable engineering wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Cover & Durability poster

The rule, 3 worked examples, and the mistake everyone makes.

Educational reference. Cover, exposure classes and w/c limits are code values, not decisions to be made on site.

Questions about the Cover & Durability poster

What’s on the Cover & Durability poster?
The rule, 3 worked examples, and the mistake everyone makes. Durability is set by the cover to the steel and by the permeability of the concrete a…; Nominal cover = minimum cover + allowance; Internal and dry = Least cover needed; Marine splash zone = Most cover, lowest w/c; Carbonation reaches steel = Passive layer breaks; Common mistake: Treating cover as a fixing tolerance → Cover is a design requirement. Educational reference. Cover, exposure classes and w/c limits are code values, not decisions to be made on site.
Who is the Cover & Durability poster for?
Cover & Durability belongs to the Civil Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning civil materials can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Cover & Durability poster?
Whenever cover is being trimmed to fit steel that will not go in. A wall chart earns its place by being glanceable from where the work is happening, so Cover & Durability belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
What other posters go with Cover & Durability?
Reinforcement, Aggregates and Bituminous Materials sit alongside Cover & Durability in the Civil Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.ReinforcementAggregatesBituminous Materials
Is the Cover & Durability poster free to download and print?
Yes. Cover & Durability downloads as a free PDF with no account, no email and no watermark, like everything else in the Civil Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Cover & Durability poster print at?
Cover & Durability is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Cover & Durability loses nothing.Printing guide

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