How are lintels measured?
Lintels must have adequate support at each end, and typically, the length of lintel for a masonry wall is calculated by measuring the total width of the structural opening, and adding 150 mm for end-bearings at each end.
What is a precast concrete lintel?
Lintel: A beam spanning an opening in a wall and formed by a precast prestressed lintel acting compositely with a number of masonry course above it.
How do you calculate lintel load?
Measure the size of the open space between the walls where the door/window frame is fitted. Add a minimum of 150mm to each end. For example, for a structural opening or clear span of 1,800mm, the minimum lintel length required will be 1,800 + 150 + 150 = 2,100mm.
How do you calculate concrete for a deck?
CONCRETE CALCULATOR FORMULA Multiply the length by the width to determine square footage. Convert the thickness from inches to feet. Multiply the thickness in feet by the square footage to determine cubic feet. Convert cubic feet to cubic yards by multiplying by .037.
What size do concrete lintels come in?
Concrete lintels are available in a range of lengths including: 600mm, 900mm, 1200mm, 1350mm, 1500mm and 1800mm.
What is the size of lintel?
The width of the lintel can be equal to the thickness of the opening & depth in the range between 1/12 to 1/8 of the span. Minimum width of lintel 4 inches (100 mm) should be provided.
What is the maximum span for a concrete lintel?
1200mm
Plugging and drilling is acceptable providing that the location of prestressing tendons is not compromised. For spans greater than 1200mm, lintels should be adequately propped during construction at a maximum of 1200mm centres.
How much bearing does a concrete lintel need?
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. On top of that, there are other things to be aware of during installation to ensure the lintel is correctly supported and able to do the job expected of it.
How do you calculate concrete material?
The quantities of materials for 1 m3 of concrete production can be calculated as follows: The weight of cement required = 7.29 x 50 = 364.5 kg. Weight of fine aggregate (sand) = 1.5 x 364.5 = 546.75 kg. Weight of coarse aggregate = 3 x 364.5 = 1093.5 kg.
How are stressline concrete lintels used in construction?
Using bespoke machinery at our Leicestershire site, stressline concrete lintels are the benchmark in prestressed structural building products. Our standard lintels are designed to support a variety of loads including masonry, timber floor loads, roof loads, concrete floor loads and much more.
How are load span tables used for prestressed concrete?
The load span tables for prestressed concrete lintels are very similar to the steel lintel tables with the exception of two values. UDL means uniformly distributed load which is measured in kiloNewtons per metre (kN/m). The principle is the same however; the higher the value, the better the load bearing capabilities on the lintel.
Are there load span tables for concrete lintels?
However, for anyone starting out in the industry, getting to grips with interpreting the load spans for prestressed concrete lintels and steel lintels is not always straight forward. This post examines the load span tables featured for both concrete and steel lintels and will demonstrate how you should interpret the values within them.
What kind of lintel is used for load bearing walls?
The prestressed concrete lintel is a cost effective and flexible solution to support load bearing walls and a number of types and sizes are available as standard.