What materials are specified for numerals in IS 10090?

The standard covers cast aluminium alloy, wrought aluminium, cast brass, wrought brass, plastics (like polycarbonate), and stainless steel (Clause 4).

What are the standard sizes for numerals according to this code?

The code specifies heights of 40, 50, 60, 75, 100, 125, and 150 mm, with corresponding widths and thicknesses detailed in Table 1.

What kind of finish is required for these numerals?

Numerals must be free from casting, moulding or fabrication defects, with smooth surfaces and edges. Specific finishes like polishing, anodizing or satin finish depend on the material used (Clause 6).

Does the standard specify how to fix the numerals?

Yes, it specifies the provision of at least two countersunk holes for fixing with wood screws (Clause 6.1.4). The recommended screw is No. 4 as per IS 6760.

IS 10090

: 1982

Specification for numerical

CurrentSpecializedSpecificationArchitectural · Builder Hardware

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This standard specifies the requirements for materials, dimensions, manufacture, and finish for numericals (numbers 0 to 9) used for building identification purposes. It covers numerals made from various materials including cast and wrought alloys of aluminium and brass, as well as stainless steel and plastics.

Specification for numerical

Quick Reference Values

Minimum specified height of numeral40 mm

Maximum specified height of numeral150 mm

Nominal thickness for cast brass numerals2.5 mm

Nominal thickness for wrought stainless steel numerals1.25 mm

Tolerance on height dimensions±1.0 mm

Recommended fixing screwNo. 4 slotted countersunk head wood screw as per IS 6760

Practical Notes

When specifying, clearly state the material (e.g., SS 304, cast brass) and size required, as the standard provides multiple options.

This standard covers screw-fixed numerals. For adhesive-backed types, rely on manufacturer specifications and test for suitability on the intended surface.

The finish (e.g., polished, satin, anodized) should be selected based on architectural requirements and environmental exposure to prevent degradation.