Steel H-Beam with Bolted Splice Connection Plates for On-Site Assembly of Multi-Story Steel Frame Structures

Target Keywords

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Brief Description

Shop-fabricated H-beam with match-drilled bolted splice connection plates for fast on-site segment assembly. Eliminates field welding - a 4-bolter crew completes a typical splice in 30-45 minutes, reducing crane and labor costs on multi-story steel frame projects.

Detailed Description

This H-beam with integrated splice connection plates is engineered for multi-story steel frame construction where beams must be delivered in transportable segments and assembled on site via bolted connections - no field welding. Each splice is designed per AISC 360 or Eurocode 3 for the specific internal forces (moment, shear, and axial load) at the connection point. The web splice plates (8-bolt and 12-bolt patterns as shown in the product image) are fabricated from steel plate matching the main beam grade and match-drilled as paired sets in our shop, guaranteeing 100% bolt alignment on site without reaming. For moment-resisting splices, we add top and bottom flange splice plates designed for the tension-compression couple, with complete connection certification provided. Splice plates can be configured as bearing-type (bolt shear, for static loads) or slip-critical (pre-tensioned bolts with faying surface preparation Class A/B, for fatigue or load-reversal applications). The bolt tightening specification - snug-tight, turn-of-nut, or DTI washer method - is laser-etched directly on each splice plate for the erector's reference. Beam segments are sized (typically 6-12m) for lifting by standard mobile cranes rather than heavy crawler cranes, often saving more in site equipment costs than the splice fabrication cost. Each beam ships with its matched bolt kit (Grade 8.8 or 10.9 high-strength bolts, washers, nuts) in labeled bags and includes an erection manual with exploded assembly views. Standard surface preparation is SA 2.5 shot blasting plus epoxy primer (60μm). Trial assembly with laser alignment verification is performed in-shop before painting, with match marks stamped on both beam ends and splice plates.

Product Attributes

Product Selling Points

Engineered, not estimated: Each splice plate thickness, bolt count, and bolt spacing is calculated for the specific internal forces at that joint - shear, moment, and axial load all considered per AISC 360 or Eurocode 3

Match-drilled = zero field issues: Both sides of every splice are drilled as a matching pair in-shop. When the erector bolts them on site, every hole aligns - no reaming, no delays

Reduced crane requirements: A 24m beam split into three 8m segments can be lifted by a 25-ton mobile crane instead of a 100-ton crawler - the crane cost savings alone often exceed the splice fabrication cost

Slip-critical ready: For structures requiring slip-critical connections (fatigue loading, load reversal), we provide faying surface preparation (Class A/B) and pre-tensioned bolt assemblies

Complete traceability: Each splice assembly is tagged with a unique ID, and the bolt torque/tension specification is laser-etched on the plate - the erector always knows exactly what to do

Company Advantages

Splice design expertise: Our engineers design each splice for the exact moment, shear, and axial load at the connection point - we don't use generic splice tables

Match-drilling precision: Paired splice plates are match-drilled together in the shop, guaranteeing 100% bolt alignment on site without reaming

Ergonomic for erection: Beam segments are sized to be lifted by standard mobile cranes (vs. a single long beam needing a heavy crawler crane), reducing site equipment costs

Fast on-site assembly: Bolted splices eliminate field welding - a 4-bolter crew can complete a typical splice in 30-45 minutes

Complete bolt kits included: Every beam ships with its matched bolt set, washers, and nuts in labeled bags - never wait for missing fasteners on site

Frequently Asked Questions (FAQ)

Q1: What is the difference between a bearing-type and slip-critical splice connection?

A: Bearing-type connections rely on bolt shear strength - simpler, lower cost, used for static loads. Slip-critical connections rely on friction between the plates (achieved by pre-tensioned bolts) and are required for fatigue loading, load reversal, or when slip cannot be tolerated. We fabricate both types per your specification.

Q2: How do you ensure the two beam segments align perfectly after splicing?

A: We assemble both segments with the splice plates in the shop as a trial fit before painting. Alignment is verified with a laser, and match marks are stamped on both beam ends and plates. On site, the erector simply aligns the match marks and inserts bolts.

Q3: Can you provide a moment-resisting splice (not just shear)?

A: Yes. A moment-resisting splice requires both flange splice plates (top and bottom) and web splice plates. We design the flange plates for the tension/compression couple and the web plates for shear. Full moment connection certification is provided with the fabrication package.

Q4: What bolt tightening method do you recommend for site assembly?

A: For bearing-type splices, the snug-tight method (full effort of a worker with a standard spud wrench) is usually sufficient. For slip-critical splices, we recommend the turn-of-nut method or direct tension indicating (DTI) washers. The specified method is noted on the splice plates and in the erection manual we provide with every shipment.

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