2026-02-10
Walkthrough Frame Type Scaffolding

Work-through Scaffold Frame Applications


Walk-through (or walk-thru/arch/masonry) scaffold frames feature an open arch design at the base (typically providing ~6' headroom), allowing unobstructed passage for workers, pedestrians, wheelbarrows, materials, or equipment underneath. This makes them ideal for scenarios requiring continuous ground-level access while providing elevated working platforms. They are commonly used in frame-and-brace scaffolding systems and are popular in the US (e.g., Safway, Bil-Jax, Waco styles).
Primary Applications


These frames excel in high-traffic or access-critical projects:


Masonry & Bricklaying Designed for the masonry industry, allows long, continuous platforms along walls while workers move freely below carrying bricks, blocks, or tools.


Stucco & Plastering provides easy passage for mixing equipment, hoses, or wheelbarrows; supports exterior finishing work on residential/commercial buildings.


Sidewalk Protection & Pedestrian Canopies (Sidewalk Sheds) Widely used in urban areas (e.g., New York City) to create overhead protection; frames support plywood/debris netting while allowing safe pedestrian passage below. Often paired with bridge legs for extended spans.



Building Maintenance & Renovation: Exterior repairs, painting, window installation, or facade work; enable movement along building perimeters without obstructions.


General Construction & Access Residential, commercial, and industrial sites for concrete pouring, cladding, or equipment maintenance; supports slab formwork or shoring in some configurations.


Key Benefits Driving These Applications


Unobstructed Access — Workers up to ~6' tall can pass underneath without ducking.
Material Flow — Easy transport of wheelbarrows, carts, or long materials.
Safety & Efficiency — Reduces tripping hazards; OSHA-compliant when properly assembled.
Versatility — Stacks with standard frames for multi-level platforms.


Comparison to Mason Frames


While both are used in masonry, key differences affect applications:


Feature
Mason (Step/Ladder) Frames

Walk-Through Frames


Design
Built-in rungs for climbing and plank support
Open arch (no mid-rungs) for full passage
Best For
Mid-level workbench needs; heavy material staging
Easy movement of wheelbarrows, long runs, pedestrian access under scaffold
Obstructions
Some at mid-height (rungs)
Minimal; clear walkthrough up to ~6' tall
Common Use
Pure masonry (brick/stucco close to wall)
Masonry + material transport; sidewalk sheds


Specifications of Mason Scaffold Frame (Masonry Walk-Through Scaffold)

The following specifications are commonly used standard models for foreign trade export, complying with internationally universal dimensions (suitable for European, American, Southeast Asian, and other markets). Covering core parameters such as size, material, load capacity, and process, they can be directly used in product manuals, quotations, or purchase contracts:
I. Core Dimension Parameters (Unit: mm)
Category
Exact Technical Specifications
Test/Executive Standards
Main Structure Dimensions (mm)
Frame Width: 914±1mm / 1219±1mm (Optional) 
Frame Height: 1700±1mm / 1930±1mm / 2000±1mm (Optional) 
Vertical Tube Diameter: 42×2.5±0.1mm / 48×2.75±0.1mm 
Crossbar Spacing: 900±2mm / 1000±2mm 
Vertical Tube Center Distance: 914mm / 1219mm (Consistent with width, tolerance ±0.5mm)
GB/T 19154-2017 Clause 5.2 
EN 12811-1:2003 Clause 6.3
Material Standards
Main Frame: Q235B Low-Carbon Steel (C content 0.12%-0.20%, Mn content 0.30%-0.65%) 
Heavy-Duty Main Frame: Q355B High-Strength Steel (Yield Strength ≥355MPa) 
Cross Bracing: Q235A Steel (Tensile Strength ≥370MPa) 
Connecting Rod: 45# Steel (Quenched and Tempered, Hardness HB200-230)
GB/T 700-2006 
ASTM A36/A36M-20 
EN 10025-2:2004
Surface Treatment
Hot-Dip Galvanizing: Coating Thickness ≥85μm (Minimum Local Thickness ≥70μm), Salt Spray Test (ASTM B117) ≥72 Hours Without Red Rust 
Electro-Galvanizing (Economical Model): Coating Thickness ≥20μm, Salt Spray Test ≥24 Hours Without Rust 
Welding Process: Automatic CO Gas Shielded Welding, Weld Height ≥4.0mm, Weld Inspection Conforming to GB/T 11345-2013 Class 
ASTM B117 
GB/T 11345-2013 
EN ISO 15614-1:2017
Load Capacity (Exact Test Values)
Rated Static Load: 25kN/(Uniform Load, Test Standard GB/T 19154-2017 Clause 6.5) 
Single Vertical Tube Axial Load-Bearing Capacity: 18kN (Ultimate Load ≥36kN) 
Lateral Displacement Resistance: ≤L/600 (L = Scaffold Span, Tested Under Horizontal Load of 1kN) 
Wind Resistance Grade: ≥Grade 10 (No Permanent Deformation at Wind Speed of 25m/s
GB/T 19154-2017 Clauses 6.5-6.7 
ANSI A10.8-2011 Clause 5.3
Exact Specifications of Core Accessories
Cross Bracing: Length 1700±2mm / 1930±2mm, Tube Diameter 25×2.0±0.05mm, Tensile Strength ≥350MPa 
Adjustable Base Jack: Adjustment Range 0~150mm, Base Plate 150×150×8±0.2mm (Q235 Steel Plate Stamping), Load-Bearing ≥30kN 
Connecting Rod: Diameter 16±0.1mm, Length 160±1mm, Surface Carburizing Treatment (Hardness HRC40-45)
GB/T 19154-2017 Appendix A 
EN 12811-2:2003
Executive Standards (Exact Clauses)
China: GB 19154-2017 Chapters 5-7 (Dimensional Deviation, Material Requirements, Load Testing) 
EU: EN 12811-1:2003 Clauses 5-8 (Including Essential Parameters for CE Certification) 
USA: ANSI A10.8-2011 5.1-5.6 (Load Safety Factor ≥2.5) 
Australia: AS/NZS 1576.3:2013 4.3 (Surface Treatment and Durability Requirements
Citation of Corresponding Standard Clauses (Essential for Foreign Trade Compliance)
II. Accessory Specifications
Accessory Name
Exact Technical Specifications
Test/Executive Standards
Cross Bracing
Material: Q235A Steel (Tensile Strength ≥370MPa, Yield Strength ≥235MPa) 
Dimensions: Length 1700±2mm / 1930±2mm (matching corresponding frame height), Tube Diameter 25×2.0±0.05mm, Vertical Tube Spacing 914/1219mm (matching frame width) 
Process: Overall hot-dip galvanizing (Coating Thickness ≥80μm, Salt Spray Test ASTM B117 ≥48 Hours Without Rust), Stamped end joints (Tolerance ±0.3mm)
GB/T 19154-2017 Appendix A.2 
EN 12811-2:2003 Clause 7.2 
ANSI A10.8-2011 5.4
Connecting Rod
Material: 45# Steel (Quenched and Tempered, Hardness HB200-230, Carbon Content 0.42%-0.50%) 
Dimensions: Diameter 16±0.1mm, Length 160±1mm, Thread Specification M16×1.5 (Tolerance ±0.05mm) 
Process: Surface Carburizing Treatment (Carburized Layer Thickness 0.8-1.2mm), Anti-Rust Grease Coating (Compliant with GB/T 4879-2016)
GB/T 19154-2017 5.6 
EN ISO 898-1:2014 
ASTM A325-2017
Adjustable Base Jack
Material: Base Plate Q235B (Thickness 8±0.2mm, Size 150×150±1mm), Adjusting Screw 45# Steel (Diameter 36mm, Pitch 4mm) 
Performance: Adjustment Range 0~150mm (Smooth Adjustment Without Jamming), Rated Load-Bearing Capacity ≥30kN (No Permanent Deformation Under Axial Pressure Test) 
Process: Stamped base plate, Hot-dip galvanized screw (Coating Thickness ≥70μm)
GB/T 19154-2017 5.5 
EN 12811-3:2004 
AS/NZS 1576.3:2013 Clause 5.2
Safety Net
Material: High-Density Polyethylene (HDPE), Wire Diameter 2.0±0.05mm 
Dimensions: Mesh Size 50×50±2mm, Net Sheet Specification 2000×1000mm/2440×1219mm (matching frame width) 
Performance: Tensile Strength ≥1.8kN/m, Elongation at Break ≤15%, Flame Retardant Grade V-2 (Compliant with UL94 Standard)
GB 5725-2019 
EN 1263-1:2019 
ANSI A10.11-2014
Horizontal Frame
Material: Crossbar Q235A Steel (Tube Diameter 38×2.0±0.1mm), Bracket Q235B Steel 
Dimensions: Width 914±1mm / 1219±1mm (matching frame width), Crossbar Spacing 500±2mm 
Process: Automatic CO Gas Shielded Welding, Weld Height ≥3.5mm, Weld Inspection Conforming to GB/T 11345-2013 Class II
GB/T 19154-2017 5.4 
EN 12811-1:2003 Clause 6.4