Reinforcing

A

A
Stock bars are supplied in 12 metre
notional lengths in diameters of 12mm and above in original manufacturers bundles. Tolerances for stock lengths shall be subject to BS4449: 2005

A+(B)-0.5r-d
Neither A nor B shall be less
than P in Table 2

A + (B) – 0.43R – 1.2d
Neither A nor B shall be less
than P in Table 2 nor less than
(R + 6d)

A + 0.57B + (C) – 1.6d
B shall not be less than 2(r + d). Neither A nor C shall be less than P in Table 2 nor less than (B/2 + 5d). See Note 3.
Key: 1 – Semi-circular

A + (C) – 4d
Neither A nor (C) shall be less than P in Table 2. See note 1.

A + (C)
Neither A nor (C) shall be less than P in Table 2. See note 1.

A + B + (C) – r – 2d
Neither A nor (C) shall be less
than P in Table 2

A + B + C + (D) – 1.5r – 3d
C shall not be less than 2(r + d). Neither A nor (D) shall be less than P in Table 2. (D) shall not be less than (C/2 + 5d).
Key: 1 – Semi-Circular

A + B + (C) – r – 2d
Neither A nor (C) shall be less
than P in Table 2

A+B+(C)
A and (C) are at 90° to one another

A + B + (E)
Neither A nor B shall be less than P in Table 2. If E is the critical dimension, schedule a 99 and specify A or B as the
free dimension. See note 1.

A + B + (C)
Neither A nor (C) shall be less
than P in Table 2. See note 1.

A + B + (C) – 0.5r – d
Neither A nor (C) shall be less
than P in Table 2. See note 1.

A + B + (C) – 0.5r – d
Neither A nor (C) shall be less
than P in Table 2. See note 1.

A + B + (C) – r – 2d
Neither A nor (C) shall be less
than P in Table 2. See note 1.

A + B + C + (D) – 1.5r – 3d
Neither A nor (D) shall be less
than P in Table 2

A + B + C + (D) – 1.5r – 3d
Neither A nor (D) shall be less
than P in Table 2. See note 1.

2A + 1.7B + 2(C) – 4d
A shall not be less than 12d + 30mm. B shall not be less than 2(r + d). (C) shall not be less than P in Table 2, nor less than
(B/2 + 5d.) See Note 3.
Key: 1 – Semi-circular

A + B + C + (E) – 0.5r – d
Neither A nor (E) shall be less
than P in Table 2. See note 1.

A + B + C + (E) – 0.5r – d
Neither A nor (E) shall be less
than P in Table 2. See note 1.

A + B + C + (D) – r – 2d
Neither A nor (D) shall be less
than P in Table 2. See note 1

A + B + C + D + (E) – 2r – 4d
Neither A nor (E) shall be less
than P in Table 2.

A + B + C + D + (E) – 2r – 4d
Neither A nor (E) shall be less
than P in Table 2. See note 1.

A + 2B + C + (E)
Neither A nor (E) shall be less
than P in Table 2. See note 1.

2A + B + 2C + 1.5r – 3d
(C) and (D) shall be equal and
not more than A nor less than
P in Table 2. Where (C) and (D)
are to be minimized the following
formula may be used:
L = 2A + B + max (21d, 240)

2A + B + 2(C) – r – 2d
(C) and (D) shall be equal and not more than A nor less than P in Table 2

2 (A + B + (C)) – 2.5r – 5d
(C) and (D) shall be equal and
not more than A or B nor less
than P in Table 2. Where (C)
and (D) are to be minimized
the following formula may be
used: L = 2A + 2B + max
(16d, 160)

2(A + B) + 2(C) – 1.5r – 3d
(C) and (D) shall be equal and not more than B nor less than P in Table 2, Where (C) and (D) are to be minimized
the following formula may be used: For bar sizes <16: L = 2A + 2B + max (20d, 180). For bar sizes >20: L = 2A + 2B + 21d

A + B + C + (D) + 2(E) – 2.5r – 5d
(E) & (F) shall be equal and
not more than B or C, nor less
than P in Table 2

2A + 3B + 2(C) – 3r – 6d
(C) and (D) shall be equal and
not more than A or B nor less
than P in Table 2. Where (C)
and (D) are to be minimized
the following formula may be
used: L = 2A + 3B + max (14d, 150)

A + B + C + 2D + E + (F) – 3r – 6d
Neither A nor (F) shall be less
than P in Table 2. See note 2.

A
See Clause 10

π (A-d) + B
Where B is the overlap

Cπ (A-d)
Where B is greater than A/5
this equation no longer applies,
in which case the following
formula may be used:
L = C ((π(A-d))² + B²)0.5
C = Number of turns

A + 2B + C + (D) – 2r – 4d
Isometric sketch.
Neither C nor (D) shall be less
than P in Table 2