(a) All materials stored in tiers shall be stacked, racked, blocked, interlocked, or otherwise secured to prevent sliding, falling or collapse.
(b) Maximum safe load limits of floors within buildings and structures, in pounds per square foot, shall be conspicuously posted in all storage areas, except for floor or slab on grade. Maximum safe loads shall not be exceeded.
(c) Aisles and passageways shall be kept clear to provide for the free and safe movement of material handling equipment or employees. Such areas shall be kept in good repair.
(d) When a difference in road or working levels exist, means such as ramps, blocking, or grading shall be used to ensure the safe movement of vehicles between the two levels.
(e) When necessary to store building material on public thoroughfares, care must be exercised to see that it is so piled or stacked as to be safe against collapse or falling over.
(f) Material must be so located as not to interfere with, or present a hazard to employees, traffic, or the public.
(2) Material storage.
(a)(i) Material stored inside buildings under construction shall not be placed within six feet of any hoistway or inside floor openings, nor within ten feet of an exterior wall which does not extend above the top of the material stored.
(ii) Temporary floors, used in steel erection, concrete forms and shoring (i.e., stripped forms, shoring jacks, clamps, steel rods or pipes, base plates, etc.) placed within close proximity to an open-sided floor for movement to another tier for placement, shall be considered "in-process equipment and subject to the provisions contained in Parts "O" and "P" of this standard. When this type equipment is to be left overnight or for longer periods of time it shall be anchored and braced to prevent displacement in any direction. In addition this equipment shall be subject to the provisions of this subsection while in "interim storage."
(b) Each employee required to work on stored material in silos, hoppers, tanks, and similar storage areas shall be equipped with personal fall arrest equipment meeting the requirements of chapter 296-155
WAC, Part C-1.
(c) Noncompatible materials shall be segregated in storage.
(d) Bagged materials shall be stacked by stepping back the layers and cross-keying the bags at least every ten bags high.
(i) When cement and lime is delivered in paper bags they shall be carefully handled to prevent the bags bursting.
(ii) Cement and lime bags shall not be piled more than ten bags high except when stored in bins or enclosures built for the purpose of storage.
(iii) When bags are removed from the pile, the length of the pile shall be kept at an even height, and the necessary step backs every five bags maintained.
(iv) Persons handling cement and lime bags shall wear eye protection which prevents contact between the substance and the worker's eyes (such as goggles or other sealed eye protection) and shall wear long sleeve shirts with close fitting collar and cuffs.
(v) Persons shall be warned against wearing clothing that has become hard and stiff with cement.
(vi) Persons shall be instructed to report any susceptibility of their skin to cement and lime burns.
(vii) A hand cream or vaseline and eye wash shall be provided and kept ready for use to prevent burns.
(viii) Lime shall be stored in a dry place to prevent a premature slacking action that may cause fire.
(e) Materials shall not be stored on scaffolds or runways in excess of supplies needed for immediate operations.
(f) Brick stacks shall not be more than seven feet in height. When a loose brick stack reaches a height of four feet, it shall be tapered back two inches in every foot of height above the four-foot level.
(i) Brick shall never be stacked, for storage purposes, on scaffolds or runways.
(ii) When delivering brick on scaffolds inside the wall lines in wheelbarrows, they shall be dumped toward the inside of the building and not toward the wall.
(iii) Blocks shall always be stacked and not thrown in a loose pile.
(g) When masonry blocks are stacked higher than six feet, the stack shall be tapered back one-half block per tier above the 6-foot level.
(i) When blocks are stacked inside a building, the piles shall be so distributed as not to overload the floor on which they stand.
(ii) Blocks shall not be dropped or thrown from an elevation or delivered through chutes.
(i) Used lumber shall have all nails withdrawn before stacking.
(ii) Lumber shall be stacked on level and solidly supported sills.
(iii) Lumber shall be so stacked as to be stable and self-supporting.
(iv) Lumber stacks shall not exceed twenty feet in height provided that lumber to be handled manually shall not be stacked more than sixteen feet high.
(v) All stored lumber shall be stacked on timber sills to keep it off the ground. Sills shall be placed level on solid supports.
(vi) Cross strips shall be placed in the stacks when they are stacked more than four feet high.
(i) Structural steel, poles, pipe, bar stock, and other cylindrical materials, unless racked, shall be stacked and blocked so as to prevent spreading or tilting.
(i) Persons handling reinforcing steel shall wear heavy gloves.
(ii) When bending of reinforcing steel is done on the job, a strong bench shall be provided, set up on even dry ground or a floor for the persons to work on.
(iii) Structural steel shall be carefully piled to prevent danger of members rolling off or the pile toppling over.
(iv) Structural steel shall be kept in low piles, consideration being given to the sequence of use of the members.
(v) Corrugated and flat iron shall be stacked in flat piles, with the piles not more than four feet high and spacing strips shall be placed between each bundle.
(j) Sand, gravel and crushed stone.
(i) Stock piles shall be frequently inspected to prevent their becoming unsafe by continued adding to or withdrawing from the stock.
(ii) If material becomes frozen, it shall not be removed in a manner that would produce an overhang.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.440, 49.17.060, and 29 C.F.R. 1926, Subpart CC. 12-01-086, § 296-155-325, filed 12/20/11, effective 2/1/12. Statutory Authority: Chapter 49.17 RCW. 95-10-016, § 296-155-325, filed 4/25/95, effective 10/1/95; 94-15-096 (Order 94-07), § 296-155-325, filed 7/20/94, effective 9/20/94. Statutory Authority: RCW 49.17.040 and 49.17.050. 86-03-074 (Order 86-14), § 296-155-325, filed 1/21/86; Order 74-26, § 296-155-325, filed 5/7/74, effective 6/6/74.]