CDS Structural Assessment & Demolition Methods Flashcards

What is the primary purpose of a pre-demolition structural assessment?

Answer: Identify structural systems, load paths, and potential collapse hazards

A pre-demolition structural assessment identifies load-bearing elements, structural systems, and hazards to plan a safe and controlled demolition sequence.

Which demolition method uses long-boom excavators with attachments to systematically dismantle a structure from the top down?

Answer: High-Reach Mechanical Demolition

High-reach mechanical demolition uses long-boom excavators equipped with demolition attachments to remove a structure from the top down in a controlled manner.

Wrecking ball demolition is most appropriate for:

Answer: Heavy reinforced concrete or masonry structures with adequate surrounding clearance

Wrecking ball demolition is most effective on reinforced concrete or masonry buildings where there is adequate clearance from adjacent structures.

What is progressive collapse, and why is it a key concern during demolition?

Answer: Uncontrolled sequential failure of structural elements beyond the intended demolition zone

Progressive collapse is the uncontrolled failure of adjacent structural elements triggered by an initial collapse, posing a major safety risk during demolition.

Which structural system typically requires temporary shoring before interior demolition to prevent premature collapse?

Answer: Load-bearing masonry walls

Load-bearing masonry walls carry floor and roof loads, so they require temporary shoring before removal to prevent unplanned structural collapse.

Implosion (explosive demolition) is best suited for:

Answer: Large, isolated reinforced concrete or steel structures with an adequate fall zone

Implosion is most appropriate for large, isolated reinforced concrete or steel buildings where a sufficient exclusion zone can be established around the structure.