Selecting The Correct Lintel

5 Things You Need to Know When Selecting a Steel Lintel

1. The wall construction

Cavity Wall

Timber Frame

Single Leaf

Solid Wall

Internal Partion

External Solid Wall

 

Example: Cavity Wall Construction

 

You will need to know:

A – Outer Leaf = 102mm Brick

B – Cavity = 100mm

C – Inner Leaf = 100mm Block

 

 

 

 

 

2. The length of the lintel

Example: Lintel Length

How wide is the structural opening?

1. Measure the size of the structural opening i.e. the clear span between the masonry supports.

2. Add 150mm minimum bearing to each end.

 

Example lintel length = 150 + 1800 + 150 = 2100mm

 

3. The load to be supported by the lintel

The load on a lintel comes from:

1. Masonry

2. Roof Loads: Truss/Attic/Cut/…

3. Floor Loads: Joists/Slabs/…

4. Live Loads: Residential use/ Commercial use/ Industrial use

5. Combination of above

 

Note: If you are not skilled in calculation loads please contact our Technical Team.

 

4. The load ratio between the inner and outer leaves of the cavity wall

 

Load ratio 3:1

Up to 75% of the load is on the Inner Leaf

Load ratio 19:1

Up to 95% of the load is on the Inner Leaf

Example 4:

Load / Ratio Calculation:

Differential load ration 3:1 =

≤ 75% load on the Inner Leaf ≥ 25% load on the Outer Leaf

Differential load ration 19:1 =

≤ 95% load on the Inner Leaf ≥ 5% load on the Outer Leaf

 

5. How to interpret the load tables.

 

 

PLEASE DO NOT HESITATE TO CONTACT THE IG TECHNICAL TEAM IF YOU REQUIRE FURTHER GUIDANCE ON SELECTING THE CORRECT LINTEL.