Section 27-570
§ 27-570 Earth pressures and foundation loads. The provisions of
article three of subchapter eleven of this chapter shall apply.
Section 27-571
§ 27-571 Bins and bunkers. Loads on component parts of bins and
bunkers may be reduced for friction on sidewalls, provided that
sidewalls and supports are proportioned for the increased vertical
loads. Where stresses would be increased in any component by arching of
the fill, the effect of such arching shall be considered.
Section 27-572
§ 27-572 Prestressing forces. Prestressing forces shall be considered
in the design of prestressed concrete structures, cable structures,
guyed structures, and multiple intersecting truss webs utilizing tension
members.
Section 27-573
§ 27-573 Construction loads. The provisions of subchapter nineteen of
this chapter shall apply.
Section 27-574
§ 27-574 Fluid pressures. The design of building components shall
consider pressures, both positive and negative, of confined fluids and
gases.
Section 27-575
§ 27-575 Ice. The weight of a one-half inch radial thickness of ice on
all surfaces shall be considered as part of the live load in the design
of open framed or guyed towers.
Section 27-576
§ 27-576 Thermal forces. The design of enclosed buildings more than
two hundred fifty feet in plan dimension shall provide for the forces
and/or movements resulting from an assumed expansion corresponding to a
change in temperature of forty degrees F. For exterior exposed frames,
arches, or shells regardless of plan dimensions, the design shall
provide for the forces and/or movements resulting from an assumed
expansion and contraction corresponding to an increase or decrease in
temperature of forty degrees F for concrete or masonry construction and
sixty degrees F for metal construction. For determining required
anchorage for piping, the forces shall be determined on the basis of
temperature variations for the specific service conditions. Friction
forces in expansion bearings shall be considered.
Section 27-577
§ 27-577 Shrinkage. The design of reinforced concrete components shall
provide for the forces and/or movements resulting from shrinkage of the
concrete in the amount of 0.0002 times the length between contraction
joints for standard weight concrete, and 0.0003 times the length between
contraction joints for lightweight concrete. The design of arches and
similar structures shall provide for effects of shrinkage, plus
rib-shortening, plus plastic flow.
To the extent possible under law, Friends of Devin Balkind for Public Advocate has waived all copyright and related or neighboring rights to New York City Administrative Code. This work is published from: United States.
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