Designing for heavy and mass timber builds brings a unique set of complexities regarding the supply chain and timely delivery of materials. In contrast to steel and concrete, which can typically be delivered to a job site quickly, timber requires more engineering and manufacturing time. Many issues can be avoided, however, with careful planning and an understanding of the pressures that timber builds face, from lead times to site logistics.

To help support your timber builds, we’ve created the following guide.

• Know Your Lead Times – Will your timber arrive in four weeks or four months? Variables such as manufacturers’ schedules, high demand / diminished supply, and cost fluctuations can exacerbate delivery delays. Additionally, because mass timber components are custom made off-site, any discrepancies in dimensions and cuts can cause major delays awaiting refabrication and installation. Close coordination by architects, engineers, and timber craftsmen will lessen the chances of errors and help keep schedules as accurate as possible.
• On-Site Flexibility Is Limited – Late design changes can snarl a timber project. Because mass timber is manufactured off-site, there’s very little modification that can take place during construction that won’t result in refabrication and massive time delays. As noted above, coordination between all parties is essential to avoid costly delays — design adjustments in particular should be addressed at the earliest possible stage.
• Site Logistics Can Cause Delays – The inherent nature of mass timber panels means they are large, heavy, and can be challenging to unload and install in tight spaces. To keep the process moving efficiently, prepare by coordinating sequencing and ensuring adequate crane access and staging space. On the plus side, once timber panels start going into place, the process is often much faster than a traditional steel and concrete build and requires less manpower.
• Weather Can Be a Factor – Rain and snow will alter construction timelines depending on the region and time of year. With mass timber, protecting components from exposure to the elements is important to mitigate delays, particularly when installing any metal joinery that might rust next to wet wood. Replacing parts due to the impact of weather will cause delays and drive costs higher.
• Code Acceptance Isn’t Uniform – Although the 2021 International Building Code (IBC) introduced new provisions with three new construction types that affect the height and number of stories allowed in mass timber buildings — Types IV-A, IV-B, and IV-C — not all states have adopted these guidelines. On the other hand, some states (Illinois, Wyoming, and Mississippi) have started following the 2024 IBC, which allows for 100% exposure of beams for ceilings and integral beams for Type IV-B construction. Knowing the applicable codes for the job site in the early planning stages saves untold headaches and work interruptions in the long run.

Avoid Supply Chain Surprises

Understanding the nuances of the timber supply chain is essential for delivering successful timber-based projects on time and within budget. From early coordination and clear communication to an awareness of evolving codes and logistical realities, anticipating supply chain challenges may mean the difference between numerous delays and smooth execution. Architects who stay informed and plan ahead can harness the beauty and sustainability of mass timber while navigating the practicalities of construction with confidence.

Mid-Atlantic Timberframes has worked with architects, engineers, and GCs for over 25 years, ensuring delivery of high-quality heavy and mass timber components on time and on budget. Contact us today to discuss how we can help your next project.