SHAPE AND THICKNESS DIMENSIONAL TOLERANCES

A = ± 4% of specified dimension (but not more than 2.39 mm) (see note)

B (wall thickness -open shape) = ± 10% of specified dimension but not exceeding either ± 0.25 mm(see note)

B (flat profiles width from 304.8 till 1981.2 mm) = ± 15% of specified dimension to 3.175 mm thickness but not exceeding ± 0.25 mm min

B (Flat Sheets width from 304.8 till 1981.2 mm) = ± 10% of specified dimension up 3.175 mm thickness but not exceeding ± 1.27 mm max

C (wall thickness - close shape) = ± 20% of specified dimension but not exceeding 0.25 mm min (see note)

Note: APPLICABLE TO SHAPES THAT CAN BE INSCRIBED IN A 914.4 mm MAX DIAMETER CIRCLE

STRAIGHTNESS

Rods and square, hexagonal, and octagonal bars – all dimensions:
D = 2.5 mm/m, measured without taking into account the profile weight
Rectangular bars up to 38.07 mm width and to 2.38 mm thickness, included:
D = 4.17 mm/m, measured without taking into account the profile weight
Rectangular bars up to 38.07 mm width and over 2.38 mm thickness:
D = 3.33 mm/m, measured without taking into account the profile weight
Rectangular bars over 38.07 mm width and all thicknesses:
D = 3.33 mm/m, measured without taking into account the profile weight
Open shapes, all dimensions:
D = 4.17 mm/m, measured without taking into account the profile weight
Closed shapes, all dimensions:
D = 2.5 mm/m,
Flat SheetD = 2.5 mm/m,

Measured when weight of pultrusion minimizes the deviation by contact with flat surface

TWIST

LENGTHS OVER 6 m ARE NOT CONSIDERED IN THIS STANDARD
BARS and OPEN SHAPES :
All dimensions and thickness: permitted Y = 3.28°/m twist up to 6. m in length
CLOSED SHAPES:
All dimensions and thicknesses : permitted Y = 3.28°/m twist up to 6 m in length, but not more than 7° total
THE MEASUREMENT MUST BE DONE KEEPING ONE SIDE OF THE PROFILE WELL FIXED ON A FLAT SURFACE AND MEASURING THE ANGLE DEVIATION ON THE OPPOSITE SIDE WHEN THE PROFILE WEIGHT MINIMIZES THE TWIST.

FLATNESS (FLAT SURFACES)

STANDARD BARS, SOLID SHAPES, SEMIHOLLOW SHAPES, AND FLAT SHEET
Width till 25.4 mm
PERMITTED A VERTICAL DEVIATION OF 0.2 mm x W (mm)
Width up to 25.4 mm
PERMITTED A VERTICAL DEVIATION OF 0.008 mm x W (mm) FOR ALL DIMENSIONS IN TERMS OF THICKNESS
IF "W" = 120 mm, THE VERTICAL DEVIATION "D" IS: 0.008 x120 = 0.96 mm
FLAT SHEETS
PERMITTED A VERTICAL DEVIATION OF 0.008 mm x W (mm) 6.35 mm max.

FOR ALL DIMENSIONS IN TERMS THICKNESS

ANGULARITY

Leg thickness up to 19.02 mm included ± 2° THE STANDARD DOES NOT APPLY TO THICKNESS OVER 19.02 mm

SQUARENESS OF END CUT

Profiles over 50.8 mm in diameter or width: ± 1°
Profiles 50. 8 mm inclusive and under in diameter or width: ± 2°