Advisory Desk
AD 543: Deflection of composite slabs
Occasionally, SCI’s advisory desk is asked about the simplified rules for controlling the deflection of steel-concrete composite slabs by limiting their …
AD 541: Imposed roof loads in combination with PV
Photovoltaic arrays (PV) are becoming common on roofs. They’re increasingly being added to new structures and retrofitted to existing ones. The UK National …
AD 539: Locking devices for fasteners subject to vibration
SCI is occasionally asked about nuts coming loose if joints are subject to vibration. A number of solutions are possible of which the following are examples. …
AD 537: Web resistance
The Blue Book contains values of web resistance, for various stiff bearing lengths, ss. During the work to prepare for the “Generation 2” changes, it has …
AD 536: In-plane member buckling lengths for portal frames
The verification of members in portal frames leads to a common question about in-plane buckling lengths, especially when designers are using general software. …
AD 535: Horizontal lateral loading on internal load-bearing walls in residential buildings
There are two sources of horizontal lateral loading on internal walls in residential buildings that should be considered in their design. These are loads …
AD 534: Anchorage length of horizontal stiffeners in steel and composite beams with large web openings
In SCI publication P355 Design of composite beams with large web openings, some typographical mistakes have been found in the equations for the anchorage …
AD 532: Integral bracing and diaphragm action of light steel framed walls
The purpose of this advisory desk note is to highlight that guidance provided in SCI P437 supersedes guidance previously provided in SCI ED002 in relation to …
AD 531: Heavy power floats on composite slabs during construction
It has come to SCI’s attention that composite slabs are being loaded with large power floats weighing up to 1 tonne, that have not been accounted for in the …
AD 530: Countersunk head bolts
Countersunk head bolts may be manufactured with a slot (for a screwdriver), see Fig. 1, or a hexagonal socket (for an allen key driver), see Fig. 2. This AD is …
