Understand SIA Standards: Erdlen Architektur Provides Insights

Erdlen Architektur, a Basel-based architecture and engineering firm, is distinguished by its extensive experience in the construction industry. The firm's owner, a qualified engineer and architect, has worked with renowned firms such as Oliv Architekten, Takenaka, Karl and P. Her focus is on optimizing construction processes, from planning and tendering to construction execution and site management, with a deep understanding of SIA standards at the core.

What Are SIA Standards?

The SIA, or Schweizerischer Ingenieur- und Architektenverein, is Switzerland's premier professional association for engineers and architects, boasting over 16,000 members. Their standards form a comprehensive framework for the construction industry, covering everything from technical specifications to contractual obligations. Unlike mandatory laws, SIA norms are voluntary but become binding once referenced in contracts—making them a flexible yet powerful tool for clarity and risk management.

SIA standards are categorized into three main types:

• Technical Norms: These define engineering and design requirements, like load-bearing capacities or material durability (e.g., SIA 260 for structural basics or SIA 265 for timber construction).

• Contractual Norms: Focused on legal and procedural aspects, such as SIA 118 for general conditions in construction contracts or SIA 117 for tendering processes.

• Understanding Norms: These promote clear communication and collaboration, like SIA 102 for architects' services and fees.

What sets SIA apart is its holistic approach: standards evolve with technology, ecology, and legal changes, ensuring Swiss builds remain innovative yet safe.

 For instance, the SIA 269 series addresses existing structures, vital for renovations in our historic landscapes.

The Role of SIA in Project Phases: A Structured Path to SuccessAt Erdlen Architektur, we structure every project around SIA's phased model, primarily drawn from SIA 112 (for general processes) and SIA 102 (for architectural services). This ensures transparency, minimizes misunderstandings, and aligns with our goal of process optimization. Here's a breakdown of the key phases:

Phase	Description	Erdlen Architektur's Approach
1: Initiation & Feasibility (SIA Phase 11-21)	Define goals, site analysis, and rough cost estimates.	We conduct thorough feasibility studies to spot risks early, integrating sustainability metrics from SIA 380/1 for energy efficiency.
2: Concept Design (SIA Phase 31)	Develop initial sketches, 3D models, and preliminary plans.	Leveraging SIA 102, we create visually compelling concepts that balance aesthetics with functional requirements, like accessibility per SIA 500.
3: Project Planning (SIA Phase 41)	Detailed drawings, material specs, and tender documents.	Our expertise shines here—using SIA 117 for streamlined tenders, we secure competitive bids while maintaining high-end quality.
4: Preparation for Execution (SIA Phase 51)	Final approvals, permits, and contractor selection.	We optimize timelines with SIA 118's precedence rules to resolve conflicts swiftly, avoiding costly delays.
5: Execution & Supervision (SIA Phase 52-61)	On-site construction, quality control, and adjustments.	As general contractors, we oversee daily ops, ensuring compliance with technical norms like SIA 261 for concrete structures.
6: Completion & Handover (SIA Phase 62-71)	Final inspections, documentation, and facility management setup.	We deliver turnkey projects with full SIA-compliant warranties, plus tips for long-term maintenance under SIA 269.