Metal Construction Leonhardt – Fertigung

Locksmith and metal construction in Frankfurt: steel, aluminium and stainless steel work, railings, doors, gates and custom-made products

Leonhardt GmbH + Co. KG Metallhandwerk

Frankfurt am Main (Heidelberger Str. 18)New on Amplifa

1902Founded

3Employees

Frankfurt am MainLocation

About Us

Leonhardt GmbH + Co. KG is a locksmith and metal construction business in Frankfurt am Main, founded in 1902 by Friedrich Leonhardt as an ornamental and structural metalworking shop and family-owned for over 120 years. The three-person team produces single-unit and custom-made items from steel, stainless steel (V2A) and aluminium. The range of services includes metal construction and steel work such as balcony and stair railings, canopies, roof coverings, mailbox systems, fences, grilles, window grilles, scissor grilles, grating and also doors and gates including T30 to T180 steel doors as well as smoke and fire protection doors. In addition, ornamental blacksmith work, stainless steel work, steel furniture, stairs, parking barriers as well as maintenance, repair and restoration are offered. Steel work is primed, painted, powder-coated or galvanized; aluminium work is anodized or executed in RAL colors. Services include planning, site measurement and installation from a single source; the main area of activity is the Rhine-Main region.

Site: Frankfurt am Main
Processes: Metal construction (aluminium work: windows, doors, gates, facade elements, railings, canopies), Steel construction (windows, doors, gates, balcony railings, fences, grilles, stairs, steel, Surface treatment: priming, painting, powder coating, galvanizing (steel work), Anodizing (aluminium work in RAL colors or anodized), Welding, Ornamental blacksmith work / forging work, Structural locksmithing (grilles, window grilles, scissor grilles, gratings, roller grilles, grille, Stair construction (spiral stairs, stringer stairs, steel stairs, interior stairs, exterior stairs)
Materials: Steel, Stainless steel V2A, Aluminium (anodized or RAL color), Iron, Glass (glass inserts, curved glass, glass doors), Stainless Steel V2A, Aluminium, Glass
Founded: 1902
Employees: 3
Industries: Construction industry, Building security/burglary protection, Private customers Rhine-Main, Private customers/construction industry Rhine-Main, Mechanical engineering (internship positions offered)

01
Planning and site measurement
02
Manufacturing (locksmithing, welding, ornamental blacksmith work)
03
Surface treatment (priming, painting, powder coating, galvanizing)
04
Assembly
05
Maintenance and repair

Materials and Processes

Steel

Base material for steel construction such as railings, doors, gates, stairs and fences, primed, painted, powder-coated or galvanized.

V2A

Stainless Steel V2A

For stainless steel work such as railings, handrails, gates and cladding.

Aluminium

For windows, doors, gates, facade elements and railings, anodized or in RAL colors.

Iron

Material for ornamental blacksmith work.

Glas

Glass

Glass inserts, curved glass and glass doors for doors and systems.

Locations

Frankfurt am Main

Workshop/Facility

Lot size: Single-unit production
Materials: Steel, stainless steel V2A, aluminium, iron

Components

**Parking barrier / wheel clamp**Steel construction · Anti-theft device/illegal parking deterrent

**Cargo bike body (custom-made product)**Metal construction · Custom-made product

Inside the production

Workshop of the locksmith shop in Frankfurt am Main

Industries

Construction industryBuilding security/burglary protectionPrivate customers Rhine-MainPrivate customers/construction industry Rhine-MainMechanical engineering (internship positions offered)

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Metal construction (aluminium work: windows, doors, gates, facade elements, railings, canopies)Assembly	–	–	–	–	Aluminium, Steel, Stainless steel (V2A)
Steel construction (windows, doors, gates, balcony railings, fences, grilles, stairs, steelAssembly	–	–	–	–	Steel, Stainless steel
Surface treatment: priming, painting, powder coating, galvanizing (steel work)Surface	–	–	–	–	Steel
Anodizing (aluminium work in RAL colors or anodized)Surface	–	–	–	–	Aluminium
WeldingJoining	–	–	–	–	Steel, Stainless steel, Aluminium
Ornamental blacksmith work / forging workForming	–	–	–	–	Steel, Iron
Structural locksmithing (grilles, window grilles, scissor grilles, gratings, roller grilles, grilleAssembly	–	–	–	–	Steel, Stainless steel
Stair construction (spiral stairs, stringer stairs, steel stairs, interior stairs, exterior stairs)Assembly	–	–	–	–	Steel, Stainless steel, Aluminium
Repairs, restorations, maintenance (doors, windows, sliding doors, T30 doors)Assembly	–	–	–	–	Steel, Aluminium, Stainless steel
Planning/design and site measurement (design engineering, individual solutions)Engineering	–	–	–	–	–

Additional services

Metal construction (aluminium and steel)Steel constructionBalcony and stair railingsCanopies and roof coveringsMailbox systemsFences and enclosuresWindow grilles, scissor grilles, gratingsDoors and gates (incl. T30-T180 steel doors, smoke and fire protection doors)Maintenance and repairsSingle-unit and custom-made productsOrnamental blacksmith workStainless steel workSteel furniturePlanning and site measurementParking barriers/pigeon protection (car clamp, Euro clamp)

History

1902
18.03.1902 Founded as Dechent & Leonhardt (locksmith shop Friedrich Leonhardt) at Bülowstraße 18 (today Heidelberger Straße), Frankfurt am Main
1921
05.04.1921 Master craftsman certificate Conrad Leonhardt
1952
14.03.1952 Master craftsman certificate Günther Leonhardt
1971
Birth of Patrick Leonhardt; later metalworker apprenticeship, master craftsman examination 1993, partner 1996, departure 2002
2002
19.12.2002 Master craftsman certificate Gregor Leonhardt
2009
15.06.2009 Business specialist for skilled crafts economics Durda Leonhardt