1. Bolt Diameter Tolerance
(As per IS / ISO manufacturing practice)
2. Bolt Length Tolerance
| Bolt Length | Tolerance |
|---|---|
| Up to 500 mm | ±2 mm |
| 500 – 1500 mm | ±3 mm |
| Above 1500 mm | ±5 mm |
3. Thread Tolerance
Metric Threads: 6g (external) as per ISO 965 / IS 4218
UNC / UNF Threads: 2A class
Thread Length: ±2 mm
4. Projection Above Concrete
| Bolt Diameter | Tolerance |
|---|---|
| M12 – M24 | ±5 mm |
| M27 – M48 | ±8 mm |
| Above M48 | ±10 mm |
5. Bolt Center-to-Center (Position) Tolerance
| Application | Tolerance |
|---|---|
| Building steel columns | ±3 mm |
| Heavy machinery base | ±2 mm |
| Towers / cranes | ±2 mm |
| General civil works | ±5 mm |
6. Verticality (Plumbness)
Maximum deviation: 1 in 100
Example: For 1000 mm bolt length → max deviation 10 mm
7. Bent Portion Tolerance (L / J Type)
Bend angle: ±2°
Bend radius: As per standard or drawing (±3 mm)
8. Plate Welded Bolt Tolerance
Plate size: ±2 mm
Plate thickness: ±0.5 mm
Plate squareness: ±1 mm
Weld alignment: ±2 mm
9. Galvanizing Allowance
Diameter increase after HDG: +0.3 to +0.6 mm
Threads generally over-tapped or chased after galvanizing
LG Industries manufactures Foundation Bolts in Ahmedabad, Gujarat (India)
LG Industries Manufactures Square Shape Foundation Bolt Is A Type Of Anchor Bolt Used To Fix Structural Steel Members, Columns, And Heavy Equipment To Concrete Foundations. It Is Characterized By A Square Section Or Square Anchor Arrangement At The Embedded End, Which Provides High Resistance Against Pull-out And Rotation.Design & ConstructionShape: Straight Round Or Square Shank With A Square Plate / Square Bend / Square Washer At The Embedded EndThreading: Threaded On The Top End To Continue
Foundation Bolt manufactured By Lg Industries Is A High-strength Fastening Component Used To Anchor Steel Structures, Columns, And Heavy Machinery Securely To Concrete Foundations. It Plays A Critical Role In Transferring Loads From The Structure To The Foundation, Ensuring Stability, Alignment, And Long-term Safety.Key FeaturesDesigned To Withstand Tensile, Shear, And Vibrational LoadsStrong Anchorage Through Bent Ends, Welded Plates, Or Chemical FixingPrecision Threading For Accur Continue
LG Industries Manufactures Square Foundation Bolt Is A Heavy-duty Anchor Bolt Used To Securely Fix Structural Steel Members, Columns, And Machinery To Concrete Foundations. It Is Identified By Its Square-shaped Embedded End Or Square Anchor Plate, Which Provides Excellent Resistance Against Pull-out And Rotation.DescriptionA Square Foundation Bolt Typically Consists Of A Threaded Round Bar With A Solid Square Section Or Square MS Plate At The Bottom End. The Square Shape Increases Bearing Ar Continue