Basic Example: Rebar Callouts Beam midspan bottom: 4 - $20\text{mm} \phi$, top: 2 - $16\text{mm} \phi$.

Intermediate Example: Stirrup Spacing Beam near supports: $10\text{mm} \phi$ @ $100\text{mm}$, midspan @ $200\text{mm}$.

Advanced Example: Column Splices A column shows a lap splice at mid-height, not at the floor line.

Basic Example: Development Length Calculate $l_{dh}$ for a $25\text{mm} \phi$ bar with a $90^\circ$ hook. ACI says $l_{dh} = 16 d_b$, tail $= 12 d_b$.

Intermediate Example: Splice Length Calculate a Class B tension lap splice for $16\text{mm} \phi$ bars. $l_d = 40 d_b$, Class B $= 1.3 l_d$.

Advanced Example: Mechanical Splices A detail specifies mechanical couplers instead of lap splices for #11 ($36\text{mm}$) bars.

Basic Example: Weld Symbols A triangle below the reference line with '6' and a circle.

Intermediate Example: Groove Welds A V-shape above the line with $60^\circ$ and $2\text{mm}$ root opening.

Advanced Example: Bolted Connections A detail shows standard holes ($+1/16''$) for $3/4''$ A325 bolts.

Basic Example: Cutting Length of a Tie Calculate a $10\text{mm} \phi$ tie for a $300\times400$ column with $40\text{mm}$ cover and two $135^\circ$ hooks ($10d_b$ each).

Intermediate Example: Main Bar Length A column is $3.5\text{m}$ clear height. Bottom dowels stick up $1.0\text{m}$. Top splice requires $1.0\text{m}$ overlap.

Advanced Example: Cranked Bars A slab bar bends up $45^\circ$ near the support. Slab depth $200\text{mm}$, cover $25\text{mm}$.