bt review

Preparation for Construction

  • Proper groundwork is essential for ensuring structural integrity and efficiency in construction tasks.

Stake-Out the Building

  • Precise staking out establishes the layout and boundaries of the construction site.

Laying the Batterboards

  • Initial setup to assist in guiding construction alignment for forms and foundations.

Formwork & Shoring (1.3)

  • Formwork: Temporary or permanent molds into which concrete is poured. Common types include:

    • Plywood Forms: Reusable and customizable.

    • Wood Formwork: Features components like:

      • Braces

      • Knee bracing

      • Kickers

    • Metal Shoring: Alternatives like adjustable metal shores and braced T and L-heads provide structural support.

Construction Tools & Equipment

  • Essential tools can be categorized into four groups:

    1. Hand Tools: Powered only by human effort.

    2. Power Tools: Operated by means other than human power.

    3. Equipment: Large tools and machines for specific tasks.

    4. Heavy Equipment: Large, powerful machines used in heavy-duty jobs.

Major Parts of a Building

  • Foundation Bed: Critical for load distribution and stability.

  • Site Investigation: Assessing soil characteristics and conditions.

  • Soil Mechanics: Understanding soil behavior under load.

  • Excavation & Earthworking: Preparing the site through digging and shaping the land.

  • Site Drainage: Essential for preventing water accumulation which can undermine foundations.

  • Slope Protection and Retaining Structures: Safeguarding against erosion and earth movement.

Shoring Components (1.3.2)

  • Shoring: A temporary structure to support a building during construction. Major components include:

    • Horizontal braces (ledger)

    • Diagonal braces (fixed/adjustable)

    • Vertical standards

Shoring Assembly Instructions (Page 7)

  1. Prepare the ground and position bases and jacks.

  2. Assemble a tower with standards and ledgers; stabilize with braces.

  3. Ensure components are fitted loosely and check for verticality.

  4. Add scaffold boards and additional components systematically.

  5. Secure primary and secondary beams with correct clamping and leveling.

Concrete and Curing (1.4)

  • Concrete Placement: Critical to ensure workability and consistency.

  • Monitor time post-mixing for optimal pouring time before concrete sets.

  • Different techniques to cure concrete include water ponding and chemical compounds to prevent drying too quickly.

Types of Tools and Equipment

Hand Tools

  • Pry Bar: Used to open boards for forming concrete.

  • Folding Rule and Tape Measure: Common measuring tools.

  • Framing Square: Used for measuring angles and cutting.

  • Level: Ensures horizontal and vertical accuracy.

Power Tools

  • Power Drill: Drills holes in various materials.

  • Circular Saw: Cuts through difficult materials.

Types of Concrete Mixtures and Proportions

  • Understanding mixes such as Class AA, Class A, etc., correlates to specific structural requirements and serves different construction needs.

Structural Components and Strength

  • Foundation Types: Vary between rock, gravel, sand, and clay standards.

  • Allowable Loads: Assessment of unit load on foundation crucial for stability.

  • Soil Mechanics: Classes of soil defined by grain size and composition affect construction viability.

Site Drainage (1.10)

  • Sub-Surface Drainage: Integral to effective site management to prevent undermining foundations and mitigating water challenges during construction.

  • Key components include:

    • Catch basins for surface runoff retention.

    • Culverts and drainage tiles for groundwater management.