STEEL STRUCTURE -II 7th SEMESTER Ordinary hinge Floating hinge PLASTIC HINGE Unit -2 • Steel stacks – known as steel chimneys which are cylindrical in shape. • Cross section area of stacks varies with quantity , type of fuel to be used in plant along with available draft for carrying burnt gases. 1. Self supporting stack • Lateral forces transmitted to foundation by cantilever action. • Lower portion of steel chimney is widened or flared for providing large base. • Constructed for diameter of 10 m and ht. of 50 – 100 meter.(approx.) 2. Guyed steel stacks • In which mild steel wire ropes or guys are attached to transmit the lateral force such as wind , seismic termed as Guyed stack or chimney. • Constructed for smaller height. Chimney lining • To protect chimney from heat • Lining material(vitrobestos , fire and refractory bricks) should be capable with standing in high temperature up to 1100 Celsius or 2000 F. • self supporting stacks are usually lined throughout the full height of chimney. Unit -2 • Steel stacks – known as steel chimneys which are cylindrical in shape. • Cross section area of stacks varies with quantity , type of fuel to be used in plant along with available draft for carrying burnt gases. 1. Self supporting stack • Lateral forces transmitted to foundation by cantilever action. • Lower portion of steel chimney is widened or flared for providing large base. • Constructed for diameter of 10 m and ht. of 50 – 100 meter.(approx.) 2. Guyed steel stacks • In which mild steel wire ropes or guys are attached to transmit the lateral force such as wind , seismic termed as Guyed stack or chimney. • Constructed for smaller height. Chimney lining • To protect chimney from heat • Lining material(vitrobestos , fire and refractory bricks) should be capable with standing in high temperature up to 1100 Celsius or 2000 F. • self supporting stacks are usually lined throughout the full height of chimney. 2. Tabular steel poles • They are made of hollow steel poles . • They can be manufactured as one large piece or several small pieces. COMPONENTS OF TOWERA. peak B. cross arm C. Boom D. Cage E. transmission tower body 2. Tabular steel poles • They are made of hollow steel poles . • They can be manufactured as one large piece or several small pieces. COMPONENTS OF TOWERA. peak B. cross arm C. Boom D. Cage E. transmission tower body Thank you………………….
