There are hundreds of fires in HDB common areas every year.
Obstruction to common corridors and fire fighting equipment (e.g.
dry risers & hose reels) can seriously hamper fire fighting
efforts and smooth evacuation in a fire emergency, endangering your
lives. Following the guidelines will help create a safer living
environment for your loved ones.
While SCDF does not permit the storage of combustible
materials along common corridors, we can allow for the placement of
shoe racks, provided;-
a. It is for the sole purpose of keeping shoes,
whereby, it would not constitute a substantial fire load,
b. A minimum clear escape passage of 1.2 m clearance is to be
maintained from the parapet wall where the shoe rack is to be
allowed.
c. No objects are to be placed along common corridors less
than 1.2 m wide.
d. No placement of items such as clothing racks unless they
can be easily folded or removed in times of emergency so that they
do not obstruct the escape route.

Strictly no placement/storage
of objects at staircases and its immediate landing is allowed.

Fire safety / fighting provisions are to be regularly serviced
and ensure its operational readiness at all times. Access to the
fire safety/fighting provisions should not be impeded at all
times.
a. No placement/storage of items within dry/wet riser
compartment.
b. No placement/storage of items within hosereel
compartment.
c. Access to dry/wet landing valves and dry/wet riser
breeching inlet at common areas should not
be obstructed.
d. Lugs to the landing valves are to be checked regularly to
ensure that it is present. If found to be missing, to replace the
missing pieces as soon as possible.
e. Fire Alarm System is to be ‘ON’ and operationally ready at
all times.
f. Smoke or heat detectors must be properly and regularly
maintained.

http://www.scdf.gov.sg/content/scdf_internet/en/community-and-volunteers/community-preparedness/fire_safety_guidelinesforhdbestates.html