How to Order Foundation Bolts | Complete Buying Guide

How to order foundation bolts ?

Ordering foundation bolts (anchor bolts) correctly is important to avoid site problems and rework. Below is a practical, step-by-step guide commonly followed in industrial, structural, and equipment foundations (India & international practice).

1️⃣ Type of Foundation Bolt

Specify the exact type required:

Define Light / Medium / Heavy Duty
L-type (Bent bolt)
J-type
Straight bolt with anchor plate
U-bolt
Rag bolt
Stud bolt with plate & nuts
Template-fixed anchor bolts (pre-engineered buildings)

📌 Example: L-type anchor bolt

2️⃣ Bolt Size & Length

Common used std for dimension : IS 5624 / DIN 529

If not mentioned above std than need to mentioned clearly:

📌 Example: M30 × 1200 mm long, threaded 300 mm at top

3️⃣ Grade / Material Specification

Choose based on load and design: Same is defined by the Structural Consultant / Architect - Based on the Load / Height of structure / Seismic zone / Vibration / Impact load .

Common grades:

📌 Example: ASTM A307 Grade B

4️⃣ Standard & Drawing Reference

Always mention:

📌 Example: As per Foundation Drawing No. FB-102 Rev-C

5️⃣ Thread Details

Specify:

📌 Example: ISO metric coarse thread, 6g

6️⃣ Nut & Washer Requirement

Mention quantity and standard:

📌 Example: 2 heavy hex nuts + 1 plate washer (75×75×8 mm)

7️⃣ Surface Finish / Coating

Very important for durability:

📌 Example: Hot dip galvanised, 80 micron min coating

8️⃣ Quantity & Packaging

Specify:

9️⃣ Inspection & Test Requirements

If required: