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Frequently Asked Questions

General

When placing bolts, nails, or other fasteners, do I need to be concerned with the location of bond lines?

My structural evaluation of an existing structure indicates that my glulam beam is insufficient to support additional loads. Can I add laminations to the bottom of the beam to make it deeper and increase its capacity? Are there issues of which I should be aware?

What is the difference between balanced and unbalanced glulam beams?

I have a glulam beam that is deeper than I need. Can I rip it to a shallower depth? Should I remove the excess depth from the top or from the bottom?

Can glulam be used to meet the requirements of Heavy Timber Construction?

Can glulam be used in one-hour fire-rated construction?

I have a glulam beam that is cupped. What causes cupping, and will it cause structural problems?

Can structural glued laminated timber (glulam) be used outdoors?

Can I drill a vertical hole through a glulam beam to install a light fixture?

Treating Glulam Timbers with Waterborne Preservatives

Download all of the questions and answers. (pdf)

Can structural glued laminated timber (glulam) be treated with waterborne preservatives after laminating?

Why is wood pressure-treated?

Can pressure-treated glulam be used in place of treated sawn timbers?

Will pressure-treatment with waterborne chemicals after bonding cause delamination?

How will pressure-treatment with waterborne chemicals after bonding affect the appearance of glulam?

Does glulam need to be incised when it is treated after bonding?

What waterborne chemicals are used to treat timbers?

 

 
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