Assalamualaikum SE Pakistan,
 
	Im designing a steel gable frame with a large span about 28m, and the LTB for beam design govern the design. i have the lb (braced length of flexural member) is the same as actual length (no bracings) so i gotta enlarge the section. 
 
	1. how do you properly braced the beam? please include some pictures
 
	2. does adding a web stiffener is the same as adding a bracing?
 
	3. could the purlin acts as the same as the bracing does?
 
	best regards