Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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Guidelines for Safety Requirements for Shoring Concrete Formwork 485
SECTION 7 — HORIZONTAL SHORING BEAMS
Concrete
Plywood
Stringer
Shore head
Building drophead
Building column
Cross brace
Horizontal shore
Shoring frame
Adjustable
screw leg
Sill
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Horizontal Shore at Drophead
7.0 See Section 2, "General Requirements for Shoring".
7.1 Published horizontal shoring beams' allowable loads shall be based on tests conducted by the manufacturer to
determine load necessary to:
(1) Eliminate camber on adjustable horizontal members with built-in camber.
(2) Deflect the member a maximum of 1/360th of the span, or 1/4 inch maximum.
Sufficient tests shall be conducted to be able to create a table for all spans and loads to which the member may
be subjected.
In addition, horizontal shoring beams shall be tested to their ultimate load which shall be at least twice the
allowable load.
7.2 The design of horizontal shoring components in shoring layouts shall be based on allowable loads which were
obtained using these test procedures and taken into account the continuity factors in multispan cases.
7.3 All horizontal shoring beams shall be inspected before using by the contractor who erects the equipment.
7.4 Erected horizontal shoring beams shall be inspected to be certain thatthe span, spacing, types of shoring beams,
and size, height and spacing of vertical shoring supports are in accordance with the shoring layout.
7.5 Adequate support shall be provided and maintained to properly distribute shoring loads. When supporting
horizontal beams on:
7.5.1 Masonry walls. Walls shall have adequate strength. Brace walls as necessary.
7.5.2 Ledgers supported by walls using bolts or other means. The ledgers shall be properly designed
and installed per recommendation of supplier or job architect/engineer. Actual anchor detail and
design is the responsibility of the engineer of record or architect.
GUIDELINES FOR SAFETY REQUIREMENTS FOR SHORING CONCRETE FORMWORK 15
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