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Structural Timber Repair
 

Western Wood Structures is an acknowledged leader throughout the U.S. in evaluating and repairing timber roof systems. We offer the complete package when it comes to repairing or upgrading your timber roof system, including inspection, repair/upgrade design, field installation and written estimates for the work.

Possible reasons for repairing or upgrading a building

  1. New equipment is required to be supported by existing beams or trusses.

  2. An addition to the structure changes the loading condition on the existing structure.

  3. A change of occupancy warrants an upgrade to existing code requirements.

  4. Roof structure components are damaged by decay.

  5. Glulam inspection detects an imperfection.

  6. Error in original design.

  7. Forklift impact.

Inspections
We offer the services of our highly experienced, licensed engineers in inspecting timber structures.  Our inspections will catalogue the existing loading on the structure and examine the condition of the structural framing.

Analysis
Our engineers will analyze the members, connections and the entire roof structure to determine if it is adequate to withstand the code-prescribed loading.  Timber design methods and allowable stresses have been continuously evolving for the last four decades.  During that same span of time, snow load requirements have become more restrictive.  This can result in a situation where beams that were once considered properly designed, are now considered insufficient according to present building code requirements.  Our analysis will determine which members, if any, are in need of upgrading to meet the code requirements.

Repair Design
When members do not meet loading requirements, Western Wood Structures offers a variety of rigorously field-tested, proprietary systems designed to provide the most cost-effective solution to increasing the load capacity or bringing your roof structure components up to code.

Field Repair Services
Our experienced field personnel are well-equipped to perform the modifications to your structure.  Whether it's replacing damaged webs of a timber truss or installing shear dowels and post-tensioning glulam beams, our field supervisors have more than 50 years combined experience in repairing timber beams and trusses.

Technical Representatives
Our technical representatives can prepare estimates for the inspection, design, and repair work.  This eliminates the need to get separate bids from both an engineer and a contractor.

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Click on a thumbnail view for additional pictures!

Reynolds Pool
 Tinora High School
Defiance, Ohio

Western Wood Structures strengthened these glulam roof beams by installing a post-tensioning system with epoxy shear dowels as needed (see Tinora H.S. Glulam Repair under White Papers).

When a change in occupancy occurred with this building, the city of Portland required these bowstring trusses to be brought up to current code.  WWS solved the problem by designing and installing a post-tensioning system consisting of high-strength cable and steel anchors.  The use of cable can be an advantage, especially when ceiling joists are framed into the lower chords of trusses.

Maverick Building
 Maverick Building
Portland, Oregon

Buckland School
 Alaska Airlines
Anchorage, Alaska

Western Wood Structures repaired these failed bowstring trusses by replacing broken members as required and installing a post-tensioning system on the lower chords (see Alaska Airlines Customer Letter under White Papers).

WWS brought these gymnasium beams up to current code by installing a post-tensioning system consisting of high strength cable and steel anchor brackets.

Oregon Episcopal School
 OES Gymnasium
Portland, Oregon

Trout Lake Farms
 Trout Lake Farms
Trout Lake, Washington

WWS reinforced the glulam arches for this building in Trout Lake, WA, with additional glulam members to increase the carrying capacity.  The allowable snow loads had been increased from the original date of construction due to changes in the building code.