FOUNDATIONS/FLOOR SLAB
There are various foundation types. These
include monolithic foundations integrated
with the floor slab in a single pour and
foundations where the slab is structurally
independent. What is critical is that there are
piers as column supports and a perimeter
footing to support the non-structural wall
framing.
FRAMING
The building utilizes two distinct types of steel
members – hot formed steel for columns and
beams and cold formed steel for the nonstructural wall framing.
The structural steel consists of columns (hollow
tube or I-beams ), beams and trusses, all formed
under heat.
Lightweight steel framing (LSF) consists of thin
galvanized metal formed at room temperature,
usually as C-channels.
https://www.aisc.org/why-steel/architect/
UPPER FLOORS
All the floors above the slab are formed by steel
decking covered with 3 inches of light-weight
concrete. Composite decking uses steel pins to
bond the steel deck and the concrete to the
beams and joist that support it, making for a
monolithic structure that resists torsion.
https://www.steelconstruction.info/Floor_syste
ms
ROOF
The roof itself is flat. It uses the same steel decking
and may or may not have a concrete topping. The
roof deck is covered with sheets of rigid insulation.
Additional tapered insulation provides a low slope
for drainage. There are roof drains that collect the
runoff and piping that carries the runoff out to the
ground below. The roof is covered with a single-ply
membranes for impermeability
Roofs typically have parapet walls to shield the
roof-mounted mechanical systems from view
below.
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