LVL Handbook EUROPE

2. LVL STRUCTURES IN FLOORS, WALLS, ROOFS AND IN SPECIAL APPLICATIONS

2.5.3 Reinforcement of old structures

Old wooden structures can be reinforced by screwing or

nailing LVL-C panels to their sides in areas subjected to high

shear forces or tension perpendicular to the grain. The method

is useful for notches, holes in beams, and for glulam beams

with large cracks. Old joist floors can be reinforced by fastening

LVL-P beams to the side or no top of them. Inclined screw

connections have good stiffness and provide efficient joint

action between the old joists and LVL-P reinforcement. In some

cases the reinforcements can be glued to the old structures,

but to fully utilize the advantages of rigid structural gluing the

requirements for gluing conditions and quality control of the

process must be met.

2.5.4 Stair cases

Large LVL-C panels can be used for the load-bearing structure

of staircases, forming at the same time an architecturally inter-

esting railing element. In smaller sizes, LVL boards are used

as stair stringers which are covered with decorative panelling.

Figure 2.85.

Reinforcing structures with LVL-C panels. Glulam

beams with notches, holes, prevention of drying cracks.

Figure 2.86.

Staircase of LVL-C.

Metsä Wood

102

LVL Handbook Europe