Fireproofing chemical-containing wood material and production method therefor

Wood containing a fireproofing chemical which comprises wood injected with a fireproofing chemical inside,

• wherein the wood is structural LVL in which multiple layers of raw material veneers constituted by a section of only sapwood section, a section of only heartwood section or a mixed section of the sapwood section and the heartwood section are laminated in a front and back thickness direction via an adhesive layer,
• wherein the raw material veneer is a rotary veneer provided with lathe checks,
• wherein the longitudinal direction of the wood is substantially coincided with a fiber direction and a lengthwise direction of the lathe checks,
• wherein the wood has injection holes with circular cross section extending in the thickness direction from each of the front and back surfaces of the LVL,
• wherein the injection holes penetrate a plurality of the raw material veneers and an adhesive layer between the raw material veneers,
• wherein each of the injection holes on the front and back surfaces is arranged in plural numbers at intervals in a width direction and a lengthwise direction of the LVL,
• wherein among the injection holes, injection holes from the front surface and injection holes from the back surface are arranged at different positions in the width direction and the lengthwise direction, and
• wherein all the raw material veneers are provided with the injection holes from at least one of the injection holes from the front surface and the injection holes from the back surface.