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IS 4650:1968 is the Indian Standard (BIS) for wooden anvil blocks. This standard prescribes the requirements regarding the material, dimensions, manufacture, and finish of wooden anvil blocks used for supporting hand-working anvils in workshops and smithies.
GG-S-752BU.S. General Services Administration (GSA), USA
MediumWithdrawn
Stand, Blacksmith's-Anvil
Covers the functional requirement for an anvil stand, allowing for both wood and fabricated steel construction.
BS 5756:1997British Standards Institution (BSI), UK
LowWithdrawn
Specification for visual strength grading of temperate hardwood
Specifies visual grading of hardwood for structural use, relevant for material selection but not the final product.
Key Differences
≠IS 4650 is exclusively for wooden blocks and specifies Indian timber species (Sal, Babul, etc.), whereas international practices and specifications like GG-S-752B are broader, explicitly allowing for fabricated steel stands as an alternative.
≠The Indian standard is highly prescriptive, mandating a single piece of wood for the block. International best practices and historical standards are more flexible, often allowing for laminated or built-up wooden blocks, which can be more stable and use timber more efficiently.
≠IS 4650 specifies exact dimensions for reinforcement straps (40 x 6 mm mild steel). Equivalent international standards typically focus on the performance of the reinforcement (i.e., that it must prevent splitting) rather than prescribing specific material dimensions.
Key Similarities
≈The fundamental purpose is identical: to provide a stable, durable, and shock-absorbing base for a blacksmith's anvil at a proper working height.
≈Both the IS standard and general international principles require the use of sound, solid timber that is free from decay, large loose knots, or other major defects that would compromise structural integrity and safety.
≈All related standards emphasize the need for dimensional stability, requiring well-seasoned timber to minimize cracking and warping during its service life. IS 4650 achieves this by specifying a maximum moisture content.
≈The use of metal straps or bands near the top and bottom of the block to prevent splitting from the anvil's impact and wood's natural checking is a common feature in both the IS standard and traditional international designs.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Material
Specified Indian hardwoods such as Sal (Shorea robusta), Babul (Acacia nilotica), Laurel (Terminalia tomentosa).
Heavy, dense hardwoods like Oak, Maple, or Hickory; also allows for fabricated steel.
GG-S-752B
Construction Method
Shall be made from one solid piece of wood.
Permits solid log, built-up/laminated wood block, or welded steel construction.
GG-S-752B
Moisture Content
Shall not exceed 25% at the time of supply.
No specific value, but requires 'well-seasoned' timber, typically implying a moisture content below 20% for stability.
General practice / GG-S-752B
Standard Heights
500 mm, 550 mm, and 600 mm.
Not specified; height is determined by the purchaser to suit the user's knuckle height.
GG-S-752B
Reinforcement Straps
Two mild steel flats, 40 mm wide and 6 mm thick.
Requires two steel bands or straps for wooden blocks, dimensions not specified, performance-based.
GG-S-752B
Permissible Defects
Specifies limits on knots, cracks, and presence of heartwood.
Requires 'sound wood, free from defects which may impair strength or durability'. Less numerically defined.
GG-S-752B
⚠ Verify details from original standards before use
Key Values2
Quick Reference Values
moisture contentMaximum 15 percent
slope of grainNot exceeding 1 in 15
Tables & Referenced Sections
Key Tables
Table 1 - Recommended Species of Timber for Anvil Blocks