BS 8110 Part 3 is the part of the British Standard for structural concrete that contains design charts for singly reinforced beams, doubly reinforced beams and rectangular columns. Engineers and students use these charts as a quick aid when checking reinforced concrete sections at the ultimate limit state.<\/p>\n
BS 8110 is the British Standard code of practice for the structural use of concrete. Part 1 covers design and construction, Part 2 covers special circumstances, and Part 3 provides design charts. The Part 3 charts are based on the assumptions in BS 8110-1, using the parabolic-rectangular stress block throughout. They cannot give the complete detailed design of a member, but they help when analyzing the cross section of a beam or column at the ultimate limit state.<\/p>\n
This download contains BS 8110 Part 3: design charts for singly reinforced beams, doubly reinforced beams and rectangular columns. The charts are a design aid for analyzing member cross sections at the ultimate limit state and are intended to be used together with the design rules in BS 8110 Part 1.<\/p>\n
BS 8110 is the British Standard for the structural use of concrete. It sets out how to design and build reinforced and prestressed concrete structures. It has three parts: Part 1 for routine design and construction, Part 2 for special circumstances, and Part 3 for design charts for beams and columns.<\/p>\n
In the UK, BS 8110 was withdrawn and replaced by Eurocode 2 (BS EN 1992). It is still referenced on some projects and in some countries, used in teaching, and needed when assessing older buildings. Always check which design code your project specification and local authority require.<\/p>\n
A singly reinforced beam has main reinforcement only in the tension zone. A doubly reinforced beam also has reinforcement in the compression zone. Compression steel is added when the beam depth is limited and the design moment is more than a singly reinforced section can carry.<\/p>\n
No. The standard states that the charts cannot be used to obtain the complete detailed design of a member. They are an aid for analyzing the cross section at the ultimate limit state. Shear, deflection, cracking, anchorage and detailing still need to be checked using BS 8110 Part 1.<\/p>\n
It is the idealized shape of the compressive stress in concrete at failure: stress rises along a parabolic curve and then stays constant up to the ultimate strain. BS 8110 Part 3 charts use this stress block throughout, which is why their results can differ slightly from hand calculations using the simplified rectangular block.<\/p>\n","protected":false},"excerpt":{"rendered":"