Foundations (Leaving Cert Construction Studies): Flashcards
📚Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Settlement
Settlement
When building moves downward from original position
Differential settlement
Differential settlement
Only part of structure settles below rest
Why is differential settlement more dangerous
Why is differential settlement more dangerous
Creates uneven stresses causing structural failure
Safe distance: building to tree
Safe distance: building to tree
Equals tree's mature height
Tree root effect on foundation soil
Tree root effect on foundation soil
Absorb water causing soil shrinkage
Effect of tree removal on ground
Effect of tree removal on ground
Area fills with water causing heave (swelling)
Frost heave
Frost heave
Water freezes, expands, lifts foundations upward
Pyrite location
Pyrite location
In hardcore layer beneath foundations
Pyrite + moisture produces
Pyrite + moisture produces
Sulphuric acid
Pyrite swelling effect on building
Pyrite swelling effect on building
Lifts internal floor slabs and damages supports