Anchor Bolts
Anchor bolts fix a steel base plate, equipment skid, or foundation-mounted item to concrete, transferring uplift, shear, and overturning load from the steel into the foundation. NLS sources anchor bolts to ASTM F1554, grades 36, 55, and 105, as L-bolts, J-bolts, or straight headed bolts, cast-in during the concrete pour or set with post-installed adhesive or mechanical anchors.
An anchor bolt is the connection between a steel structure and its concrete foundation, embedded in the concrete on one end and threaded to take a nut and base plate on the other. Everything the column or equipment above transfers down, dead load, wind uplift, seismic shear, overturning moment on a tall or cantilevered structure, passes through that bolt into the concrete, which makes anchor bolt grade and embedment depth a foundation design item, not a hardware afterthought.
NLS sources anchor bolts to ASTM F1554, the standard structural anchor bolt specification, in three grades: Grade 36 (the most common, lower-strength grade for standard column base plates), Grade 55, and Grade 105 (higher-strength, used where a heavier structure or higher uplift load needs more capacity per bolt). Configurations include L-bolts and J-bolts (bent at one end for embedment anchorage), straight headed anchor bolts (a forged or upset head instead of a bend), and hex head anchor bolts. NLS supplies both cast-in bolts, set in a template before the concrete pour, and post-installed anchors, chemical (adhesive) or mechanical expansion type, for fixing to existing, already-cured concrete.
On Saudi projects, anchor bolts fix structural steel column base plates, equipment and skid foundations, light pole and mast bases, and any steel-to-concrete connection carrying uplift or overturning load. Cast-in bolts need a template and correct positioning before the pour, so anchor bolt supply usually has to land on site ahead of the concrete schedule, not after.
NLS quotes anchor bolts against diameter, length, grade, and bend configuration (L, J, straight, or headed), and returns a priced quote in USD. Standard Grade 36 bolts in common diameters typically source fastest, while Grade 105 high-strength anchors or long embedment lengths more often carry a manufacturer-confirmed lead time.
Specifications
- ✓Standard: ASTM F1554, grades 36, 55, and 105
- ✓Configurations: L-bolt, J-bolt, straight headed, hex head anchor bolts
- ✓Installation: cast-in (set before concrete pour) or post-installed (chemical or mechanical anchor)
- ✓Grade 36: standard-strength, most common for column base plates
- ✓Grade 105: high-strength, for heavier uplift and overturning loads
- ✓Typical use: column base plates, equipment and skid foundations, pole and mast bases
Frequently Asked Questions
What's the difference between ASTM F1554 Grade 36, 55, and 105 anchor bolts?+
They're strength grades under the same specification. Grade 36 is the standard-strength, most common grade for typical column base plates. Grade 55 and Grade 105 step up in tensile strength for heavier structures or higher uplift and overturning loads, specified by the foundation design.
Can NLS supply anchor bolts for concrete that's already cured?+
Yes. Post-installed anchors, chemical (adhesive) or mechanical expansion type, are used for anchoring into existing, already-cured concrete where a cast-in bolt wasn't set at pour time.
Why does anchor bolt supply need to be scheduled ahead of the concrete pour?+
Cast-in bolts are set in a template and positioned in the formwork before concrete is poured, so they need to be on site and correctly located ahead of the pour date, not ordered as an afterthought once the foundation is already cast.