513 EM 385-1-1 Chapters 23-29

Sections

28-8. General Requirements.

Walking-Working Surfaces and Shear Connectors

Do not attach shear connectors to top flanges of beams, joists, or attachments in a way that they project and create tripping hazards before installing the walking-working surface.
After installing metal decking, lay out and install shear connectors, using the decking as a working platform.

Structural Steel Assembly

Maintain structural stability throughout the erection process.
For multi-story structures, install permanent floors as the structure is erected, ensuring a maximum of eight stories between floors, and no more than four floors or 48 feet of unfinished bolting or welding above the secured floor, unless the design ensures structural integrity.

Bracing Equipment Installation

Install temporary erection bracing as deemed necessary by a Competent Person (CP) to ensure structural stability.
Do not remove bracing equipment without approval from a CP.

Metal Decking Installation

Lay and secure metal decking tightly upon placement, fully supported by structural members, and do not lay more than 3,000 ft² before securing.
Ensure that metal decking bundles are landed on framing members for adequate support and are secured against displacement at the end of the shift or due to environmental conditions.
Install metal decking at roof and floor holes and openings according to specific guidelines, ensuring proper framing and protection.

Derrick Floors

Fully deck and/or plank all derrick floors and complete steel member connections for intended floor loading.
Distribute temporary loads on derrick floors over support members to avoid local overloading.

Knowledge Check Choose the best answer for the question.

28-6. For multi-story structures, permanent floors should be installed as the structure is erected, ensuring a maximum of _____.

10 stories maximum unbolted

2 stories between the surface and top floor

6 stories of unbolted floors

8 stories between floors

You forgot to answer the question!

EM 385-1-1 Paragraph 28-8 (h.–l.).

28-8. General Requirements.(h.–l.).

h.  Walking-working surfaces, shear connectors, and other similar devices. (28-8.h)

(1) Tripping hazards.  Do not attach shear connectors (for example, headed steel studs, steel bars, steel lugs), reinforcing bars, deformed anchors, or threaded studs to the top flanges of beams, joists, or beam attachments so that they project vertically from or horizontally across the top flange of the member until after the metal decking, or other walking-working surface has been installed.

(2)  When shear connectors are used in construction of composite floors, roofs, and bridge decks, lay out and install the shear connectors after the metal decking has been installed, using the metal decking as a working platform.

i.  Structural steel assembly.  (28-8.i)

(1)  Maintain structural stability always during the erection process.

(2) The following additional requirements apply to multi-story structures:

(a)  Install the permanent floors as the erection of structural members progresses. There must not be more than eight stories between the erection floor and the upper- most permanent floor, except where the structural integrity is maintained as a result of the design.

(b) At no time will there be more than four floors or 48 feet (14.6 m), whichever is less, of unfinished bolting or welding above the foundation or uppermost permanently secured floor, except where the structural integrity is maintained because of the design.

j.  Install bracing equipment, as required, before the structure is loaded with construction material (for example, loads of joists, bundles of decking, or bundles of bridging). (28-8.j)

(1)  When deemed necessary by a CP, install temporary erection bracing equipment in conjunction with the steel erection process to ensure the stability of the structure.

(2)  Do not remove bracing equipment until approved by a CP.

k.  Metal Decking. Hoist, land, and place metal decking bundles.  (28-8.k)

(1)  Lay tightly and secure metal decking upon placement to prevent accidental movement or displacement.  Do not lay more than 3,000 ft2 (278.7 m2) before securing.

(2)  During initial installation, place metal-decking panels so that they are fully supported by structural members.

(3)  Do not use bundle packaging and strapping for hoisting unless specifically designed for that purpose.

(4)  If loose items such as dunnage, flashing, or other materials are placed on the top of metal decking bundles to be hoisted, secure such items to the bundles.

(5)  Land the bundles of metal decking on joists according to paragraph 28-8.w.

(6)  Land metal decking bundles on framing members so that enough support is
    provided to allow the bundles to be un-banded without dislodging the bundles from the supports.

(7) At the end of the shift or when environmental or jobsite conditions require, secure metal decking against displacement.

(8)  Roof and floor holes and openings.  Install metal decking at roof and floor holes and openings as follows:

(a)  Framed metal deck openings must have structural members turned down to allow continuous deck installation except where not allowed by structural design constraints or constructability.

(b)  Deck over or protect roof and floor holes and openings according to chapter 24.

(c)  Do not cut metal decking holes or openings until immediately prior to being permanently filled with the equipment or structure needed or intended to fulfill its specific use and that meets the design drawings and/or manufacturers requirements or immediately cover or guard the hole or opening according to chapter 24.

l.  Derrick Floors.  (28-8.l)

(1)  Fully deck and/or plank all derrick floors and complete the steel member connections to support the intended floor loading.

(2)  Distribute temporary loads placed on derrick floors over the underlying support members to prevent local overloading of the deck material.