Steel Roof Bracing Design Example

Structural steel the structural elements that make up the frame that are essential to supporting the design loads e g.

Steel roof bracing design example.

Beams columns braces plate trusses and fasteners. Iii printed 06 05 09 foreword the structural eurocodes are a set of structural design standards developed by cen over the last 30 years to cover the design of all types of structures in steel. To illustrate this a simple design example has been presented. Steel buildings 2003 publication no 35 03 bcsa chapter 4.

Tan x 0 15 x. Architectural design in steel lawson m trebilcock p sci and spon. 31 design manual for composite decks form decks and roof decks. The skeletal structure of a roof system 18 0m long and 7 2m wide is as shown in figure below.

The aim of this post is to show in the clearest manner how steel roof design can be carried out using eurocode 3 design code. Roof diaphragm panels typically vary from 0 0295 inches to 0 064 inches in thickness and come in widths of 18 inches to 36 inches or more. 150 mm nominal allowance for depth roof frame battens and roofing. Determine the strength and stiffness requirements for the point braces and select a w shape brace based on x axis flexural buckling of the astm a992 wt7u34 column with loading and geometry as shown in figure a 6 2 1.

The following method has been used in this example to calculate the area of elevation of the triangular roof section. Design examples v15 0 american institute of steel construction example a 6 2 point stability bracing of a wt shape column given. Design examples steel structures 43. Area w 2.

Medium rise braced frames 2009. Structural shapes standard steel configurations produced by steel mills such as wide flanges channels angles pipe tubes etc. Portal frames are generally low rise structures comprising columns and horizontal or pitched rafters connected by moment resisting connections resistance to lateral and vertical actions is provided by the rigidity of the connections and the bending stiffness of the members which is increased by a suitable haunch or deepening of the rafter sections. Increase this if necessary i e.

Deck types are described in the steel deck institute sdi publication no. 36 build 134 february march 2013 roof bracing we complete this four part build series on calculating bracing requirements by looking at roof bracing. Nehrp recommended provisions steel design context in provisions steel behavior. Sci p363 steel building design.

For exposed rafter roofs. Sci p365 steel building design. Bracing local buckling limit width to thickness ratios for compression elements fracture avoid by proper detailing to allow inelastic strain.