Load Scenario Details Guide to Load tables

1 450mm of Masonry Allows for a load comprising a 450mm height of typical 100mm thick brickwork, or 450mm height of cellular blocks of thickness up to 140mm. This is intended to cover the many applications where only up to 2 courses of blocks are supported on the lintel (or 6 courses of bricks) For double or cavity wall lintels, the load allows for 450mm height of masonry on both inner and Details : kN/m2 (supported elevation area)(or twice this in the case of double or cavity walls)In our load tables , this load is taken over the clear opening span, but is not triangulated. Only typical masonry including mortar (as described) is allowed for, blocks over 140mm width may be heavier and aerated blocks may be lighter.

2 900mm of Masonry Allows for a load of up to 900mm height of typical 100mm thick brick work, or 900mm of 140mm thick block work. This is intended to cover the many applications where only up to 4 courses of blocks are supported on the lintel (or 12 courses of bricks). In the case of double or cavity wall lintels, this allows for 900mm of masonry on both inner and the outer Details : kN/m2 (supported elevation area) (or twice this in the case of double or cavity walls)In our load tables , this load is taken over the clear opening span, and is triangulated to BS 5977-1. Only typical masonry (as described) has been allowed for, blocks over 140mm width may be heavier and aerated blocks may be lighter.

3 Light Blockwork (full height)For single wall lintels this allows for the load of a typical 140mm aerated concrete block wall being supported on the lintel. For cavity lintels, it allows for typical aerated blocks (full height) up to 140mm thick on the inner but assumes the outer is still brick (full height) at double wall lintels we assume the lintel supports a full of height aerated concrete blocks of thickness up to Details : kN/m2 of supported wall elevation area. Double this for double walls, or add for cavity wall lintels) In our load tables , this load is taken over the clear opening span and triangulated as per BS 5977-1.

4 This means the height of masonry is unlimited. Any discontinuities in the masonry, such as windows, movement joints or point loads that may increase the effective load beyond the standard load triangle of masonry are not allowed for in this figure - In such cases guidance should be sought from our technical department or a structural engineer. Note that walls of lesser thickness will probably be lighter and walls of thickness greater than 140mm may be heavier. Masonry or Full Height Masonry For single walls this allows for the load of a typical 140mm cellular concrete block wall being supported on the lintel. In the case of a double wall lintel, 140mm of blockwork on each side is allowed for (280mm thick wall in total).

5 For Cavity walls, a full height of up to 140mm thick concrete block is allowed for on the inner, and a full height of 100mm brick on the Details : of supported wall elevation area. Double this for double walls, or for cavity walls add for the outer our load tables , this load is taken over the clear opening span and the supported area is triangulated as per BS 5977-1. This means the height of masonry is unlimited. Any discontinuities in the masonry, such as windows, movement joints or point loads that may affect the load triangle are not allowed for in this figure - In such cases guidance should be sought from our technical department or a structural engineer.

6 Note that walls of lesser thickness blocks will probably be lighter and walls of blocks having thickness greater than 140mm may be heavier. Light Timber Floor Allows for the load of a light timber floor applied to the lintel, via joists resting on the lintel or on the masonry immediately above the lintel. This loading allows for situations of smaller spans or where the floor construction is light for whatever reason, such as a loft. This load does not include the masonry, which is usually added separately, eg: Masonry & light timber floor . load Details : Dead load of kN/m2, Live load of kN/m2, Joist span of in total, giving on the a Guide , the following construction gives the above dead load : Typical 44x170mm softwood joists at 400mm centres, 18mm chipboard floor, underlay & carpet, 13mm plasterboard ceiling with finishes, minimal load from partitions or services.

7 This live load is typical of residential balconies, most single family residential dwelling rooms, and blocks of flats with limited communal usage. (refer BS 6399)This gives a total lintel load of , which is taken over the clear opening span for the load tables , as per BS 5977-1. Timber Floor Allows for the load of a typical timber floor applied to the lintel, via joists resting on the lintel or on the masonry immediately above the Details : Dead load of kN/m2 Live load of kN/m2 Joist span of in total giving on the a Guide , the following construction gives the above dead load : Typical 50x220mm softwood joists at 400mm centres, 18mm chipboard floor, underlay & carpet, 13mm plasterboard ceiling with finishes, partitions (non load -bearing stud walls) and services/built-ins such as typical plumbing, storage shelves, sinks & lights.

8 This live load is typical for a more highly loaded domestic room floor, hotel or motel bedroom or rooms such as billiards rooms. (Refer BS 6399)This gives a total lintel load of , which is taken over the clear opening span for the load tables , as per BS 5977-1. Tiled Roof Allows for the load of a typical timber framed, tiled roof where the truss loads are applied (directly or indirectly) onto the Details : Dead load of Live load of Truss span of in total giving kN/m on the live load in this case is a typical allowance for wind and snow loadings, which may vary depending on the location of the building and other factors.

9 The dead load allows for of tiles and in trusses and insulation. Loft floor, and other loads that may be applied to a roof truss are not included in these allowances. This gives a total lintel load of , which is taken over the clear opening span for the load tables , as per BS 5977-1. Concrete Floor Allows for the load of a typical concrete beam floor applied to the lintel, via the beams bearing onto the lintel or onto the masonry immediately above the Details : Dead load of Live load of Beam span of in total giving on the a Guide , the following construction gives the above dead load : Hollow 150mm deep concrete beams at , floor finishes at , Partitions, ceiling & services at total The live load allows for loads up to the category light industrial workrooms or offices, with storage areas.

10 This gives a total lintel load of , which is taken over the clear opening span for the load tables , as per BS Scenario DetailsGuide to load tables