Code of practice for reed walling

IS 4407: Scope & Key Specifications

Scope:
IS 4407 primarily defines standards related to timber and wood products used in construction and allied fields, aligning with international practices and Indian field conditions.

Key Points from the Scope Clause:

• Applicability: Covers definitions and requirements for timber products and related construction materials.
• Rounding Off: Numerical values must be rounded as per IS 2:1960 rules, maintaining the same number of significant digits as specified.
• International Coordination: Harmonized with global standards while considering local practices.
• Finish: Where paint or color finish is required, spraying is preferred (Clause 8.4).

Important References:

Summary Table: Rounding Off per IS 2:1960

flowchart TD
    A[IS 4407 Scope] --> B[Timber & Wood Products]
    A --> C[Paint Finish - Spraying Preferred]
    A --> D[Rounding as per IS 2:1960]
    A --> E[International Coordination]

For detailed formulas or tables, refer to respective clauses in IS 4407 and related IS codes under Timber Design and Construction.

IS 4407: Terminology and Definitions - Key Points

• Clause 2.0 defines all terms used in the standard to ensure clarity and uniform understanding.
• Rounding off (Clause 0.4):
  • Final values from tests or calculations must be rounded as per IS 2:1960.
  • The number of significant figures retained should match the specified value in the standard.
• Paint Finish (Clause 8.4):
  • Where paint finish is required, spray application is preferred for uniformity.

Rounding Off as per IS 2:1960 (Summary)

Example: If specified value is 12.3, round off 12.345 to 12.3.

General Notes:

• IS 4407 aligns with international standards and Indian practices.
• Terminology ensures consistent interpretation across civil and structural engineering fields.

flowchart LR
    A[Test/Calculation Result] --> B{Rounding per IS 2:1960}
    B -->|Match significant digits| C[Rounded Value]
    C --> D[Compliance Check]

This ensures test results comply with IS 4407 requirements.

IS 4407: Design Considerations Summary

1. Reed Board Thickness (Clause 3.1.1)

2. Hook Wire (Clause 2.3)

• Wires pass through the board to secure running wires on opposite faces.
• Ensures mechanical stability of wiring within reed boards.

3. Structural Strength (Clause 3.2)

• Test/analysis results must be rounded per IS 2:1960.
• Maintain the same number of significant digits as specified values.

Note: Use these thicknesses as minimum design parameters for different applications to ensure durability and structural integrity of reed boards. Hook wire placement is critical for securing embedded wiring safely.

flowchart LR
    A[Design Considerations] --> B[Reed Board Thickness]
    B --> C{Use Case}
    C -->|Door/Window| D[2.5 cm]
    C -->|Roof/Fencing| E[4 cm]
    C -->|Exterior Walls| F[5 cm]
    A --> G[Hook Wire Placement]
    A --> H[Structural Strength & Rounding]

IS 4407: Storage and Handling of Reed Boards

Key Specifications (Clause 4.3)

• Storage Location: Preferably in a covered shed.
• Stacking: Boards must rest off the ground.
• Ground Treatment: Sprinkle insecticide powder before stacking to prevent insect damage.
• Storage Duration: Avoid excessively long storage to maintain board quality.

Handling Tips

• Handle boards carefully to avoid damage.
• Store flat to prevent warping.

Finishing (Clause 8.4)

• Paint or color finish should preferably be applied by spraying for uniform coverage.

Summary Table for Storage

Additional Notes:

• No direct formulas are provided in IS 4407 for storage.
• Follow IS 2-1960 for rounding off values in testing and analysis.
• Proper storage ensures durability and structural strength of reed boards.

flowchart LR
    A[Receive Reed Boards] --> B[Prepare Ground with Insecticide]
    B --> C[Stack Boards Off Ground]
    C --> D[Store in Covered Shed]
    D --> E[Avoid Excessive Storage Time]
    E --> F[Apply Paint Finish by Spraying]

This ensures quality preservation and compliance with IS 4407.

IS 4407: Preliminary Work on Reed Boards

Key Specifications:

• Thickness: 2 cm, 3 cm, 4 cm, and 5 cm (Clause 3.1)
• Preferred Widths: 1 m and 2 m for dimensional coordination (Clause 3.1)

Important Guidelines:

• Handling: Reed boards must not be dragged over each other to avoid displacement of running wires or adjacent boards (Clause 4.3.1).
• Cutting: Boards should be cut carefully to maintain integrity and fit (Clause 5.1).
• Joining: Proper joining techniques must be followed to ensure structural continuity and stability (Clause 5.2).

Practical Notes:

• Use clean, sharp tools for cutting to avoid splintering.
• Align boards precisely during joining to maintain surface flatness.
• Avoid excessive force during handling to prevent damage to wires embedded in the boards.

flowchart LR
    A[Reed Boards] --> B[Cutting (Clause 5.1)]
    B --> C[Joining (Clause 5.2)]
    C --> D[Handling - No Dragging (Clause 4.3.1)]

This ensures durability and proper installation of reed boards as per IS 4407.

IS 4407: Fixing of Reed Board – Key Points

Fixing as Partitions (Clause 6.1)

• Orientation: Reeds vertical to horizontal runner.
• Runner spacing: ~1 m center-to-center.
• Jointing: Adjacent boards butt-jointed; joint at runner center.
• Fixing to wooden runners:
  • Use wood screws + diamond-shaped washers.
  • Screw spacing ≤ 30 cm c/c.
• Fixing to mild steel runners:
  • Use J-hooks + washers (no screws).
• Important: Do not fix boards into grooves (see 3.8).
• Planning: Minimize cutting/wastage near doors/windows (see 3.7).

Joining Reed Boards Side Joint (Clause 5.2.2)

• Use galvanized wire (≥0.6 mm dia).
• Thread wire through both edges.
• Tighten and twist wire tie.
• Repeat on the opposite side.

Fixing for Roof Construction (Clause 6.2)

• Use only on pitched roofs.
• Boards supported by purlins: edges rest on adjacent purlins.
• Minimum bearing on purlins: 25 mm.
• Adjacent boards butt-jointed.
• Fixing:
  • Wood purlins: wood screws.
  • Steel purlins: J-hooks.

Summary Table for Fixing Reed Board

flowchart LR
    A[Reed Board] --> B[Vertical Reeds]
    B --> C[Fixed to Horizontal Runner (~1m c/c)]
    C --> D{Runner Material?}
    D -->|Wood| E[Wood Screws + Diamond Washers (≤30cm c/c)]
    D -->|Steel| F[J-hooks + Washers]
   

IS 4407: Fixing of Reeds for In Situ Wall Construction

Key Specifications (Clause 7.3):

• Spacing between reeds: ~1 cm gap to allow mortar penetration for a strong plaster key.
• Vertical timber grooves:
  • Width: 4 cm
  • Depth: 1.5 cm
• Mortar must be forced into grooves ensuring no gap after setting, enhancing plaster bonding.

Practical Guidelines:

• Reeds fixed vertically with consistent 1 cm spacing.
• Ensure grooves on vertical timbers are clean and uniform.
• Apply plaster so it penetrates fully into grooves and gaps between reeds.

Summary Table:

flowchart LR
    A[Vertical Timber] --> B[Groove 4cm x 1.5cm]
    B --> C[Reeds spaced 1cm apart]
    C --> D[Mortar applied]
    D --> E[Plaster penetrates grooves & gaps]
    E --> F[Strong key & no gaps]

This ensures durable plaster adhesion on reed walls per IS 4407.

IS 4407 - Finishing and Protection Key Points

1. Paint Finish (Clause 8.4)

• Paint or color finish should preferably be applied by spraying for uniformity and quality.

2. Roofing Surface Finish (Clause 8.2)

• Top surface finished with cement-sand rendering (1:6 mix).
• Thickness sufficient to cover corrugations.
• Apply in two coats.
• For heavy rainfall areas, both coats should be waterproofed.
• Waterproofing by bitumen felt, limited to maximum two layers to avoid excess weight.

Summary Table: Roofing Finish

flowchart TD
    A[Roof Surface] --> B[Cement-Sand Rendering (1:6)]
    B --> C[Two Coats]
    C --> D{Heavy Rainfall Area?}
    D -- Yes --> E[Waterproofing with Bitumen Felt (max 2 layers)]
    D -- No --> F[No Waterproofing Needed]

This ensures durability, weather resistance, and aesthetic finish as per IS 4407 standards.

IS 4407 - Durability and Maintenance Key Points

Durability (Clause 3.4)

• Reed boards plastered on both sides with cement mortar are generally durable.
• In heavy rainfall areas, additional protection is needed.
• For termite-prone zones, apply termite-resistant construction measures as per IS 3632.
• Reeds must be preservative-treated before board manufacture.

Maintenance and Finishing (Clause 8.4)

• Paint or color finishes should preferably be applied by spraying for uniformity and durability.

Summary Table

Related IS Codes for Reference

• IS 3632: Anti-termite measures
• IS 2395: Cement and cement-lime plaster finishes
• IS 1322: Waterproofing with bitumen felts

flowchart TD
    A[Reed Board] --> B{Durability}
    B -->|Normal| C[Plaster both sides with cement mortar]
    B -->|Heavy Rainfall| D[Additional waterproofing]
    B -->|Termite Area| E[Preservative treatment + IS 3632 measures]
    A --> F[Fixing]
    F --> G[Nail directly to frame]
    A --> H[Finish]
    H --> I[Paint by spraying]

This ensures long life and minimal maintenance for reed board walls per IS 4407.

IS 4407: Thermal Insulation for Reed Boards

Key Specification:

• Thermal Insulation Value: ≈ 4 R cal cm/m²·h·°C (Clause 3.5)
  This means the reed board offers a thermal resistance of about 4 R-calorie per cm thickness per m² per hour per °C temperature difference.

Reed Board Thickness & Typical Uses (Clause 3.1.1):

Practical Notes:

• Thermal resistance (R-value) increases with thickness; thicker boards provide better insulation.
• For paint finish, spraying is recommended (Clause 8.4).

Formula for Thermal Resistance (R):

[ R = \frac{\text{Thickness (cm)}}{\text{Thermal Conductivity (cal/cm·s·°C)}} \quad \text{[cal cm/m}^2 \text{h}°C] ]

Given the standard R-value ≈ 4 for reed boards, thickness directly correlates with insulation.

flowchart TD
    A[Reed Board Thickness] --> B{Use Case}
    B -->|2.5 cm| C[Doors, Windows, Partitions]
    B -->|4 cm| D[Roofs, Wall Insulation, Fencing]
    B -->|5 cm| E[Exterior Walls, Chajjas]
    F[Thermal Insulation ~4 R cal/cm/m²·h·°C] --> A

Summary: Use reed boards of thickness 2.5 to 5 cm depending on application to achieve thermal insulation around 4 R cal/cm/m²·h·°C, ensuring effective temperature control in building envelopes.

IS 4407 - Termite Protection: Key Points & Specifications

• Plaster finish: Provides fair termite protection.
• Extra precaution: Use preservative treatment on reed boards.
• Reed board contact with soil:
  • Never leave reed boards in direct soil contact.
  • At plinth level, cut ends must be painted with insecticide or hot bitumen before fixing into concrete/masonry grooves.
• Fixing method:
  • Reed boards should not be fixed into grooves in wall framing.
  • Fix directly onto wall frames using nails (Clause 3.8).
• Durability:
  • Reed boards plastered on both sides with cement mortar are durable except in heavy rainfall areas.
  • In termite-prone zones, apply normal termite resistance measures as per IS 3632 (Code of Practice for termite control).

Summary Table for Termite Protection Measures

flowchart TD
    A[Reed Board] --> B{Contact with Soil?}
    B -- Yes --> C[Not Allowed: Treat or Avoid]
    B -- No --> D[Fixing Method]
    D --> E{Groove Fixing?}
    E -- Yes --> F[Not Recommended]
    E -- No --> G[Nail Directly to Frame]
    A --> H[Cut End Treatment]
    H --> I[Paint with Insecticide or Hot Bitumen]
    A --> J[Plaster Finish]
    J --> K[Cement Mortar Both Sides]
    K --> L[Good Durability & Termite Protection]

For detailed termite protection, consult IS 3632 and relevant anti-termite codes under preparation.

IS 4407: Roofing Applications - Key Points & Specifications

1. Cement-Sand Rendering (Clause 8.2):

• Mix ratio: 1:6 (Cement : Sand)
• Apply in two coats, thickness enough to cover corrugations.
• For heavy rainfall areas, both coats must be waterproofed.
• Waterproofing: Use bitumen felt, max 2 layers (light application to avoid excessive weight).

2. Reed Board Roofing (Clauses 3.6.4 & 6.2):

• Reed boards are for pitched roofs only, not flat roofs.
• Boards supported by purlins:
  • Minimum bearing on purlins = 25 mm at edges.
  • Boards butt-jointed.
  • Fixing:
    • Wood purlins → Wood screws
    • Steel purlins → J-hooks
• Before bitumen felt waterproofing, apply a cement plaster coat on reed boards for smoothness (per IS 1346-1966).

Summary Table

flowchart LR
    A[Reed Board Roofing] --> B[Pitched Roof Only]
    B --> C[Boards rest on Purlins]
    C --> D[Minimum 25 mm bearing]
    D --> E[Fixing]
    E --> F[Wood Purlins: Wood Screws]
    E --> G[Steel Purlins: J-hooks]
    A --> H[Waterproofing]
    H --> I[Cement plaster coat]
    I --> J[Bitumen felt (max 2 layers)]

This ensures durability, waterproofing, and structural stability for roofing with reeds and reed boards as per IS 4407.

IS 4407: Jointing and Fastening of Reed Boards

Key Specifications & Procedures

1. Side Jointing (Clause 5.2.2)

• Use galvanized wire ≥ 0.6 mm diameter.
• Thread wire through both edges of the joint.
• Tighten and twist wire to draw edges tightly.
• Repeat on the opposite side of the board.

2. Joining with Reeds Vertical (Clause 5.2.1)

• Edges must be straight.
• Insert a reed piece (length = empty channel length between boards), sharpen one end.
• Hammer reed under the first and second running wires.
• Repeat every 60 cm along the joint.
• Stagger jointing reeds on opposite sides.
• Finally, lace wire across the joint (refer Fig. 2).

3. Fixing Reed Boards as Partitions (Clause 6.1)

• Fix reeds vertical to horizontal runners spaced ~1 m center.
• Butt-joint adjacent boards; joints centered on runner.
• Fix to wooden runners with wood screws + diamond washers.
• Screw spacing: max 30 cm center-to-center.
• For mild steel runners, use J-hooks + washers instead of screws.
• Do not fix boards into grooves in wall framing (Clause 3.8).
• Fix boards directly to frame using nails.

Summary Table

flowchart LR
    A[Reed Boards] --> B[Edges aligned straight]
    B --> C[Thread galvanized wire (≥0.6 mm)]
    C --> D[Tighten & twist wire]
    D --> E[Insert reed piece under wires]
    E --> F[Repeat every 60 cm]
    F --> G[Fix boards to runners]
    G --> H{Runner Type}
    H -->|Wood|

IS 4407 - Dimensional Coordination Key Points

• Objective: Minimize cutting and wastage of reed boards by coordinating building and opening dimensions with board sizes.
• Reference Standard: Dimensions should align with IS 1233:1958 (specifies standard sizes for reed boards).
• Planning Module: Choose building dimensions as multiples of reed board sizes to optimize material use.
• Rounding Off: Follow IS 2:1960 for rounding numerical values in design and specification.

Practical Guidelines:

• Use standard reed board sizes from IS 1233 (e.g., 1220 mm × 2440 mm).
• Design openings and walls in multiples of these dimensions.
• Example: If reed board width = 1220 mm, plan wall lengths/openings as 1220 mm, 2440 mm, etc.
• This reduces off-cuts and wastage significantly.

Summary Table (Example Reed Board Sizes from IS 1233):

flowchart LR
    A[Building Dimensions] --> B[Match with Reed Board Sizes]
    B --> C[Minimize Cutting]
    C --> D[Reduce Wastage]
    B --> E[Use IS 1233 Standard Sizes]

In essence: Plan building layout in multiples of reed board dimensions as per IS 1233 to achieve dimensional coordination per IS 4407.

IS 4407 does not explicitly specify Safety and Handling Precautions clauses. However, based on standard engineering practice and related IS codes, key precautions for handling structural materials include:

General Safety & Handling Guidelines

• Use Personal Protective Equipment (PPE): Helmets, gloves, safety boots, eye protection.
• Material Storage: Store materials on flat, stable surfaces to avoid rolling or falling.
• Lifting and Moving: Use mechanical aids (cranes, hoists) for heavy loads; follow safe lifting techniques.
• Paint Finish (Clause 8.4): Apply paint preferably by spraying in well-ventilated areas; use masks to avoid inhalation.
• Rounding Off Values (Clause 0.4): Round test results per IS 2-1960 to maintain accuracy in safety calculations.

Related IS Code References for Safety

• IS 456 (Concrete Structures) for load handling.
• IS 800 (Steel Structures) for structural safety.
• IS 413 (Safety Code for Construction).

Summary Table for Handling Precautions

flowchart TD
    A[Material Receipt] --> B[Inspection & Testing]
    B --> C[Storage on Stable Surface]
    C --> D{Heavy Load?}
    D -- Yes --> E[Use Mechanical Lifting]
    D -- No --> F[Manual Handling with PPE]
    E --> G[Safe Placement]
    F --> G
    G --> H[Surface Finishing (Spray Paint)]
    H --> I[Final Inspection & Compliance]

Note: Always refer to specific IS codes applicable to your material and site for detailed safety instructions.