Success of mass timber and heavy timber projects starts with design. The most effective designs teams are challenged by an owner’s wants and needs, inspired by the architect’s vision, strategized by builder’s hands on experience, optimized by engineer’s calculation, and galvanized by the collaboration and interaction between all members. Working with mass timber can be a rewarding experience with the right team at the helm.


Mass timber enables functional, beautiful, and truly innovative structures. But working with mass timber can also bring increased cost and complexities related to custom elements. One of the best ways to keep your project on time and on budget is to bring a subcontractor with the knowledge and time-tested experience with mass timber. By bringing in a partner like CPI early in your project allows real-world solutions only 25 years’ experience can provide. As a Design-Build partner, we can provide the insight and foresight to overcome the unique complexities that can prolong projects and inflate budgets.

Design-build might be the best way to avoid construction delays and cost overruns on a project. These services allow for tradeoffs between cost and schedule to happen at an earlier stage. They can help ensure that any issues arising later in the process are addressed early on, before they become a problem.


  • Minimize or eliminate any design overlap
  • Identify the best opportunities for pre-fabrication
  • Reduce changes during construction
  • Expand knowledge and resources throughout the team
  • Opportunity for design enhancements
  • A builder deeply aware of the project intent and design

Value Engineering

Value engineering incorporates the creativity and ingenuity of a team to extract the maximum utility from the materials, which aren’t always necessarily wood, their connections, and other related components. By using each element’s greatest potential, teams can meet or beat budget and schedule without sacrificing essential features of a project. In this way, value engineering is less an action and more an outcome of a complete design team with effective collaboration.

Of course, the earlier in a project that design optimization decisions can be identified, the greater the positive impact to cost and reliability there will be. Nevertheless, our team of experts have contributed to these decisions at all levels of development and are open to discuss the challenges and opportunities of your project today.


Carpentry Plus, Inc. and Stonewood Structural Engineers are mass timber pioneers in the Pacific Northwest. Our common goal is to apply the knowledge gained from prior projects to help stakeholders realize the full benefits of building with mass timber. We thrive on challenges that are unique and different. Together, we are able to provide custom engineering solutions for nearly all mass timber and heavy timber structural applications. This is also why we have worked so hard to make everything else go as smoothly and simply as possible.

By capitalizing on our established engineering solutions to common conditions, Carpentry Plus and Stonewood free up resources for the truly innovative and value-added elements of a project. Invest time, money, and attention where it makes the biggest impact by taking advantage of pre-engineered systems.

Delegated Design Timber Structure

  • Innovative column to beam connections
  • Timber connection details
  • Timber stair cores
  • Lateral system

Core Systems

  • FAST | Our prefabricated core system can have over six stories constructed in a week allowing the core to be installed ahead of the remaining superstructure.
  • SAFE | With a fully constructed, permanent stair system in place, all trades will have full access to each floor as they are being constructed.
  • SUSTAINABLE | Unlike conventional concrete cores, mass timber allows for a sustainable core that is carbon neutral.


Value engineering refers to the systematic analysis of a product’s design and construction to eliminate wasted effort. An analysis is done to find ways that improve efficiency, reduce costs, or avoid mistakes. Value analysis is related to logistics and supply chain management; it’s the practice of identifying potential savings in procurement negotiations.

Cross Laminated Timber (CLT) is a wood product made by bonding together perpendicular layers of timber to form a composite material. Cross-lamination creates enormous strength and stability in multiple directions and enables new construction methods. Regular lumber is generally less expensive. However, it’s primary strength is in a single direction and therefore requires multiple members to be joined together to complete any floor, wall, or roof system. The added time and complexity of constructing with regular lumber can offset additional material costs of CLT, especially in situations involving short timeframes and/or high strength requirements.

Mass timber construction uses engineered wood columns, beams, and panels made of laminated layers of wood. These structural members can be used in lieu of steel and concrete to form the frame of a building. This method has been popularized by architectural and engineering professionals who believe it could be part of a modern approach to sustainable construction.

Though there are many factors that influence construction, large mass timber buildings can be built in much less time than traditional steel or concrete buildings. The accelerated timeline can be accomplished because the fabrication of materials occurs off-site. This means that each part of the building is pre-fabricated to the approved specifications. The full structural assembly can be completed in a matter of weeks by our on-site crew during the construction phase.

Scroll to Top