LP SolidStart I-Joists

LP® SolidStart® I-Joists are lightweight, straighter and more uniform in strength, stiffness and size than traditional lumber. They also offer wide flanges for greater stability.

Product Benefits

Quick Installation

Weighs less than traditional lumber.


Long lengths allow ceilings and floors to be designed with fewer pieces.

Peace of Mind

Less likely to split, shrink, twist, warp or bow.

Designed to Perform

Larger nailing area and increased stability.


Wood sourced through programs certified under the Sustainable Forestry Initiative®.

Product Specifications

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LP SolidStart LPI 450 and 530 I-Joists at IBS 2014

LP at the 2014 International Builders’ Show.

LP SolidStart I-Joists Product Video

Learn why LP SolidStart I-Joists are the right choice.

How It's Made

LP® SolidStart® I-Joists feature an advanced design and tough build for superior performance:

  • Combines laminated veneer lumber (LVL) or finger-jointed sawn wood flanges with a web of oriented strand board (OSB) to produce an I-shaped structural member.
  • Both materials work together to resist deflection, bending stresses and shear.
  • LVL and MSR lumber flanges up to 3-1/2˝ wide for greater stability.

Working Better Together

Product Catalog

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LP SolidStart I-Joists Warranty