How do you calculate Catnic lintel?

The length of lintel required is calculated by establishing the total width of the structural opening and adding 150mm (200mm for CXL lintels) end bearing allowance for each end. For example, an 1800mm structural opening will require a 2100mm lintel (2200mm for CXL).

What is the maximum span for a Catnic lintel?

Product Benefits Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm – 4800mm (including 4575 but excluding 4500mm). The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.

What is the minimum bearing for a Catnic lintel?

150mm
Lintels generally require a nominal minimum end bearing of 150mm at both ends, meaning the total lintel length is the span of the opening plus 300mm.

Do Catnic lintels need DPC?

Four: Protecting the lintel It is a National House Building Council (NHBC) requirement to apply a damp proof course (DPC) over each lintel to protect it. Many Catnic lintels feature a Duplex Corrosion Protection coating and a unique profile shape that acts as a built-in DPC.

How do I know what size lintel I need?

What Size Lintel Do I Need?

1. STEP 1: KNOW YOUR WALL CONSTRUCTION.
2. STEP 2: KNOW YOUR LENGTH. How wide is the structural opening? Measure the size of the structural opening i.e. the clear span between the Masonry supports.
3. STEP 3: KNOW YOUR LOAD. You need to know the load in which the Lintel will support.

How is lintel length calculated?

Also, the length of lintel in case of masonry wall is calculated by taking the measurement of the total width of the opening and adding 150 mm for end-bearings at each end. In a house, the level of lintel is generally the soffit level of a door or window.

How do I calculate the load on a lintel?

Where the lintel is supporting only masonry, the load ratio is generally 1:1. Typically this increases to 3:1 (inner to outer leaf) for lintels carrying timber floor loads, and 5:1 where concrete floor used. In eaves applications, the load ratio is 19:1.

How far should a lintel overlap?

25mm
Lintels should be installed with a minimum end bearing of 150mm at each end, and should be levelled and fully bedded on bricklaying mortar. Masonry may overhang the supporting lintel by a maximum of 25mm.

Do cavity walls need weep holes?

Cavity walls do not require additional venting beyond what weep holes provide. Unlike rain screen systems which are intentionally designed to allow air and water penetration, cavity wall systems are weathertight.

How do you calculate lintel beams?

How To Calculate Steel Quantity Of Lintel Beam – Bar Bending…

1. Length of one bar = 1.2+ (2 x 0.150) – 0.025 =1.475m.
2. Length of 5 bars = 1.425 x 5 = 7.125m.
3. Weight of steel for 10 mm bar = D²L/162 = 10² x 7.125/162 = 4.398 kg.
4. Total length of stirrups = 0.632 x 11nos = 6.952m.

Do you need building regs for a lintel?

if you change the appearance? but normally under normal or usual conditions to many people do not apply, but for the peace and safety reason , as a rule I would say YES, alterations of a structural nature require Building Control approval. Generally, the installation of a beam or lintel is required.

How far can a lintel span?

Lintel load span definitions As standard our steel lintels increase in length by 150mm, the two values represent the length of the lintel that the values in that column relate to. If it is 600 | 1200 it means the load span details can be applied to any lintel between 600mm and 1200mm.

What is the standard height of a lintel?

The height between the floor level and lintel level is referred to as lintel height. As per the building regulations, the preferable lintel height adopted for the residential building is 7′ (2.1 m ) and for the commercial buildings is 7’6”(2.3 m).

What is the minimum overhang for a lintel?

Lintels should be installed with a minimum end bearing of 150mm at each end, and should be levelled and fully bedded on bricklaying mortar. Masonry may overhang the supporting lintel by a maximum of 25mm.

Can I use DPC as a cavity tray?

High Bond DPC can be used for cavity tray applications including parapet walls, beneath copings and cappings. High load DPC should be used where it will be subject to a full storey of masonry. At complicated junctions, clear drawings and the design should be provided, and preformed cavity trays used.

Should insulation fill the whole cavity?

Insulation slabs should be of the appropriate thickness to fully fill the width of the cavity. Insulation should wrap around corners and not be cut and joined.

How do you calculate lintel area?

The lintel size is the height and width, and will be in inches. Multiply these dimensions to find the cross sectional area. Example: If the size note indicates the lintel to measure 8 by 16 inches, it will have a cross sectional area of 128 square inches.

Does a lintel need planning permission?

but normally under normal or usual conditions to many people do not apply, but for the peace and safety reason , as a rule I would say YES, alterations of a structural nature require Building Control approval. Generally, the installation of a beam or lintel is required.