Page 56 - Building Regulation and Design Guidelines - Structural (Grey Code)
P. 56

SECTION  4  STRUCTURAL DESIGN GUIDELINES - STEEL STRUCTURES                  SECTION: 4  STRUCTURAL DESIGN GUIDELINES - STEEL STRUCTURES







               4.1   INTRODUCTION                                                                         4.2.2   SEISMIC LOADS
                     The guidelines in this section are applicable for steel structure and are intended         1.   UBC 1997, Volume 2, ‘Structural Engineering Design Provisions’,
                     to provide minimum structural design requirements for steel buildings and                       Division IV ‘Earthquake Design’
                     other structures fabricated and erected with structural steel. The guidelines are          2.   Seismic zone shall be considered as per Dubai Municipality latest
                     intended to give a general idea of the basic requirements for steel structures                  Circular and Trakhees-CED evaluation.
                     while designing structures within the CED Trakhees jurisdiction.
                                                                                                                3.   For special steel structures and tall buildings, relevant sections of
                     Engineers shall refer to the applicable codes for the detailed technical guidance               structural design guidelines for building structures are applicable.
                     and requirements. It is anticipated that the use of these guidelines will result
                     in a uniform design and construction of buildings throughout projects in             4.2.3   WIND LOAD
                     CEDTrakhees jurisdiction.
                                                                                                                1.   ASCE 7: ‘Minimum Design Loads for Buildings and Other Structures’
                     Any requests for variations to the guidelines presented must be fully documented                - Chapter 6. Design shall be based on basic wind velocity of 45 m/s.
                     and presented to the CED-Trakhees for review and acceptance prior to any work
                     commencement.                                                                              2.   For all structures where wind loads are applied as per codes, other
                                                                                                                     directions than the two orthogonal ones to be investigated for
                     The design shall meet all relevant standards for safety, durability, fire resistance            ultimate and serviceability limit states. The same shall be carefully
                     and serviceability. The designer shall investigate alternative systems and shall                studied for irregular buildings.
                     achieve optimized economical and constructible solution.
                                                                                                                3.   For special steel structures and tall buildings, relevant sections of
                     Sections in design guidelines for building structures shall be referred to where                structural design guidelines for building structures are applicable.
                     indicated.
                                                                                                                4.   BS 6399-2 “Loading for Buildings – Part 2: Code of practice for
                                                                                                                     wind loads” is accepted for industrial structures only.
               4.2   APPLICABLE CODES
                     The following codes are permitted for design of steel structures. Design codes       4.2.4   DESIGN CODES
                     not listed in this document shall be submitted for review and approval prior to            1.   BS 5950 “Structural Use of Steel Works in Buildings”” is accepted
                     adopting in the design. Consultant should ensure that selected design standards                 only for steel works where the seismic forces are not governing
                     are the latest editions and fully compatible with CED’s design regulations &                    the design.
                     guidelines.
                                                                                                                2.   AISC 360: Specification for Structural Steel Buildings
                     4.2.1   DEAD AND LIVE LOADS
                                                                                                                3.   UBC 1997, Volume 2, ‘Structural Engineering Design Provisions’.
                          1.   BS 6399: Part 1 ‘Loading For Buildings: Code of Practice for Dead
                               and Imposed Loads’.                                                              4.   IBC ‘International Building Code’, excluding seismic design
                                                                                                                     provisions.
                          2.   BS  6399:  Part  3  ‘Loading  For  Buildings:  Code  of  Practice  for
                               Imposed Roof Loads’                                                              5.   For design of concrete elements, refer to the list of design codes as
                                                                                                                     defined within clause 2.4.4.
                          3.   ASCE 7: ‘Minimum Design Loads for Buildings and Other
                               Structures’, Chapter 3 ‘Dead Loads’ and Chapter 4 ‘Live Loads’
                                                                                                     4.3   PERFORMANCE CRITERIA - ANALYSIS, DESIGN AND DETAILING
                          4.   Adopted dead and live loads shall satisfy recommendations of the
                               Dubai Municipality, CED - TRAKHEES and other relevant statutory             The following sections present the analysis, design and detailing criteria
                               authorities.                                                                with particular  reference to normal and low to medium rise steel buildings
                                                                                                           and structures. For special steel structures and tall steel buildings, detailed


          110                                                                                                                                                   111
   51   52   53   54   55   56   57   58   59   60   61