Micropiles, Ground Anchors & Soil Nails — Hollow Bar (SDA) & Threaded Bar




Grone Solutions Wholesale LLC provides specialized steel components to support your micropile, anchor, and soil nail applications. Our broad sourcing network ensures fast delivery, flexible configurations, and expert guidance.
We supply complete systems for micropiles, ground anchors, and soil nails—in two configurations:
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Hollow Bar (SDA): drill-and-grout in a single pass for unstable/loose soils.
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Threaded Bar: conventional bar with separate drilling/casing—ideal where specs require solid bars or casing.
Accessories include bits, couplers, centralizers, plates, casing, grout hardware, and submittal support. Quick quotes and on-time delivery across NJ • NY • CT • PA.
Quick Selector - choose your system
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Unstable or loose soils / need speed → Hollow Bar (SDA)
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Spec requires solid bar or permanent casing → Threaded Bar
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Not sure? Share soil, loads, bar/bit sizes, and schedule—we’ll recommend the best fit.
A) Micropiles
Option 1 — Hollow Bar (SDA)
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Best for: collapsing/loose soils, tight access, faster installation
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Typical components: SDA bar (R32/R38/R51/T64/T76/T103), sacrificial bits (clay/sand/rock), system couplers, centralizers, bearing plates
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Spec snapshot: Bar OD 25–51 mm (common), bits 76–152 mm, grout ~3–5 ksi (per spec)
Option 2 — Threaded Bar
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Best for: specs calling for solid bar, permanent casing, or specific corrosion protection
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Typical components: Threaded bar (e.g., A615/A706), couplers, nuts, bearing plates, casing (as required), centralizers
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Spec snapshot: Bar diameters per design, casing per soil/diameter, grout per spec
Micropile Quote Checklist (either system): bar size/type, bit diameter, lengths (bond/total), casing (Y/N), quantities, project city/state, needed-by date.
B) Ground Anchors (Tiebacks / Rock Anchors)
Option 1 — Hollow Bar (SDA)
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Best for: temporary/permanent tiebacks in unstable soils; drill + grout in one pass
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Components: SDA bar, sacrificial bits, couplers, domed/bearing plates, grout hardware, centralizers
Option 2 — Threaded Bar
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Best for: specs requiring solid bar anchors or bonded/free length definitions with casing
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Components: Threaded bar, nuts/couplers, bearing plates, grout tubes/packers, casing (as specified), centralizers
Anchor Quote Checklist: system type, bar size, free/bond lengths, bit diameter, plate size, corrosion protection (if any), quantities, city/state, needed-by.
C) Soil Nails
Option 1 — Hollow Bar (SDA)
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Best for: shotcrete/nail walls in loose granular soils where hole stability is an issue
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Components: SDA bar, bits, couplers, nail plates, spacers/centralizers, grout hardware
Option 2 — Threaded Bar
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Best for: stable ground or when specs require solid bar nails with/without temporary casing
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Components: Threaded bar, nail plates, spacers, grout hardware, casing (as specified)
Soil Nail Quote Checklist: system type, bar size, bit diameter, nail length, plate size, corrosion protection (if required), quantities, city/state, needed-by.

Accessories
Bits (clay/sand/rock; carbide), Couplers (system- or thread-matched), Centralizers/Spacers, Bearing/Cap Plates, Nuts/Washers, Casing, Grout hardware (tubes, packers), coatings/galvanizing on request.
Note: Material specs may vary slightly by origin; supplied products meet or exceed industry standards
FAQs
1. When should I choose Hollow Bar (SDA) over Threaded Bar? Pick SDA for unstable/loose soils and speed (drill + grout in one pass). Choose Threaded Bar when specs require solid bars, permanent casing, or specific corrosion protection methods.
2. Can you help me decide between systems? Yes—share soil type, target loads, bar/bit sizes, need-by date, and we’ll recommend the most practical system.
3. What documents do you provide? Cut sheets, product data, and sample submittals. MTRs when available by mill/spec.
4. Typical lead times? Core sizes/items are often quick; specialty bits, coatings, custom plates, or casing can add time.




