Type Design for 200-Metre Stones

The Introduction section of IRC 26 primarily provides an overview and the committee members involved in the formulation of the code. It includes a figure illustrating the type design for 200-metre stones with all dimensions in millimetres. However, no specific engineering formulas, tables, or technical specifications are provided in this section. The focus is on setting the context and acknowledging contributors rather than technical content.

Sources: Clause None: 1. INTRODUCTION, Clause None: Fig. 1 Type Design for 200-Metre Stones, Clause None: [TABLE: 1. INTRODUCTION]

The scope of IRC 26 covers the standard type design for '200-Metre' stones used on all roads in India, as approved by the Indian Roads Congress in 1967. The design includes detailed cross-sectional dimensions in millimetres, as shown in Fig. 1 of the code. This standard ensures uniformity and quality in stone specifications for road construction. No specific formulas or tables are provided in the retrieved context for the scope; it primarily defines the applicability and approval history of the design.

Sources: Clause None: The type design for '200-Metre' Stones, Clause None: CROSS - SECTION, Clause None: Fig. 1 Type Design for 200-Metre Stones

The provided context from IRC 26 does not contain explicit formulas, tables, or detailed specifications for Material Requirements. However, typical material requirements for road construction stones and reinforcement include:

• Use of 200-mm size stones as per the type design shown in Fig. 1 (dimensions in millimeters).
• Reinforcement schedule example: 2 bars of 6 mm diameter, each 1400 mm long.

For comprehensive material specifications, refer to the full IRC 26 document which covers stone grading, quality, and reinforcement details. The context mentions approval dates and committees but lacks detailed technical data.

If you need specific formulas or tables for material properties or reinforcement, please provide more detailed clauses or sections.

The key specifications for Type Design and Dimensions of 200-Metre Stones as per IRC 26 include all dimensions in millimetres. The height of numerals is specified as 80 mm. Although the exact figure and detailed dimensions are not provided in the retrieved context, the standard practice per IRC 26 is to maintain consistent numeral height and stone dimensions for visibility and uniformity. Typically, the Type Design for 200-Metre Stones includes a base width, height, and numeral placement standardized for roadside visibility. For precise dimensions, refer to the figure and tables in IRC 26 which detail these measurements explicitly.

Sources: Clause None: Fig. 1 Type Design for 200-Metre Stones, Clause None: DIMENSIONS (MILLIMETRES) FOR 80 mm HEIGHT OF NUMERALS

The IRC 26 specifies that numerals on 200-metre stones must be 80 mm in height and conform to the type design shown in the standard plate (Fig. 1). The numerals used are 2, 4, 6, and 8, arranged in ascending order away from the starting station. These numerals can be painted or preferably engraved, with black color on a white background for all road categories. All dimensions for these numerals are given in millimetres as per the standard design. This ensures uniformity and visibility for distance markers on roads.

Sources: Clause None: STANDARD NUMERALS OF 80 mm HEIGHT, Clause None: DIMENSIONS (MILLIMETRES) FOR 80 mm HEIGHT OF NUMERALS, Clause None: Fig. 1 Type Design for 200-Metre Stones

As per IRC 26, 200-Metre Stones must be located on the same side of the road as the Kilometre Stones. They should be securely fixed just beyond the edge of the road formation using rammed spalls in moorum, lime-surkhi concrete, or lean cement concrete all around. The stone's inscribed side must face and be parallel to the road's centre line. The positioning differs if the road is on an embankment or in a cutting, as illustrated in Fig. 2 of IRC 26. Additionally, Fig. 1 provides the type design for 200-Metre Stones with all dimensions in millimetres. These specifications ensure proper visibility and durability of the stones along the road.

Sources: Clause None: Fig. 2, Clause None: Fig. 1

For installation of kilometre stones on embankments as per IRC 26, the stones (200-mm size) should be placed on the same side of the road as the kilometre stones. They must be securely fixed just beyond the edge of the formation with their inscribed side facing and parallel to the road centerline. Fixing can be done using rammed spalls in moorum, lime-surkhi concrete, or lean cement concrete all around. The positioning and orientation for embankment installation are illustrated in Fig. 2 of IRC 26. No explicit formulas are provided for installation, but the key specification is secure planting beyond formation edge with proper facing and fixing material. Dimensions for the stones are given in Fig. 1 (all in millimetres).

Sources: Clause None: PLAN (i) WHEN ROAD IS IN EMBANKMENT, Clause None: Fig. 1, Clause None: Fig. 2

For installation in cuttings as per IRC 26, key considerations include the location and fixing of stones, and the cross-section design. Although the exact formulas are not provided in the retrieved context, the standard practice involves using Type Design for 200-Metre Stones with all dimensions in millimetres as shown in Fig. 1. The installation must ensure stability against sliding and overturning, proper embedment in the cutting slope, and adequate drainage. The cross-section should be designed to conform to the natural slope and provide protection against erosion. Fixing methods typically involve embedding stones firmly into the soil or rock surface to prevent displacement. For precise dimensions and fixing details, refer to the Type Design figure and the clauses on location and fixing.

Sources: Fig. 1 Type Design for 200-Metre Stones, Clause 3. LOCATION AND FIXING, Clause CROSS - SECTION

For RCC stones as per IRC 26, the reinforcement schedule and specifications include:

• Stones shall be made of locally available hard stone, well-dressed or reinforced cement concrete (RCC).
• For stone slabs, the thickness may be 100 mm or locally available thickness, but not less than 50 mm.
• Reinforcement details for 200-metre stones should follow the type design specified in the code.

Unfortunately, the exact reinforcement schedule formulas or tables are not provided in the retrieved context. Typically, reinforcement in RCC stones involves placing steel bars or mesh to resist tensile stresses, but specific bar sizes, spacing, and cover are not detailed here.

For precise reinforcement schedules, refer to the detailed type design clauses or tables in IRC 26 which are not included in the current context.

As per IRC 26, the inscription on stones shall consist of numerals 2, 4, 6, and 8 arranged in ascending order away from the starting station. The numerals must be 80 mm in height and conform to the standard type shown in the Plate (Fig. 1). They may be painted or preferably engraved. The color specification requires black numerals on a white background for all road categories. Dimensions for these numerals are given in millimeters to ensure uniformity and legibility.

Sources: Clause None: DIMENSIONS (MILLIMETRES) FOR 80 mm HEIGHT OF NUMERALS, Clause None: STANDARD NUMERALS OF 80 mm HEIGHT, Clause None: Fig. 1 Type Design for 200-Metre Stones

According to IRC 26, existing Furlong Stones can be converted economically to 200-Metre Stones. The standard type design for 200-Metre Stones is provided with all dimensions in millimetres, as shown in Fig. 1 of the code. While specific formulas are not detailed in the retrieved context, the key specification is the dimensional conversion from furlong units to metric 200-metre units for roadside distance markers. The design ensures uniformity and ease of reading distances in metric units. For exact dimensions and detailed type design, refer to Fig. 1 in IRC 26, which provides the full layout and measurements for 200-Metre Stones.

Sources: Clause None: Note on conversion, Clause None: Fig. 1 Type Design for 200-Metre Stones

The IRC 26 code provides cross-sectional details primarily through Fig. 1, which is a type design for 200-metre stones with all dimensions in millimetres. Key specifications include:

• Use of 2 bars of 6 mm diameter, each 1400 mm long.
• Dimensions for numerals are specified for an 80 mm height.

These details ensure standardization in stone markers for road works. The exact figure and dimensions should be referred to for precise layout and reinforcement placement.

Sources: Clause None: CROSS - SECTION, Clause None: Fig. 1 Type Design for 200-Metre Stones, Clause None: 2 Nos BARS 6 mm ¢, EACH 1400 mm LONG, Clause None: DIMENSIONS (MILLIMETRES) FOR 80 mm HEIGHT OF NUMERALS

The retrieved context does not contain specific formulas, tables, or detailed specifications related to Maintenance and Durability Considerations from IRC 26. Generally, for maintenance and durability in reinforced concrete structures, key considerations include ensuring adequate concrete cover to reinforcement, use of quality materials, proper curing, and protection against corrosion and environmental attacks. Typical specifications involve minimum cover thickness depending on exposure conditions and use of corrosion-resistant reinforcement or coatings. Regular inspection and timely repair of cracks and damages are also essential for durability.