are more prone to splitting than softwoods (pine, etc.). The more structural of a joint you are doing, the more important it becomes to pick the right screw. Further down, I’ll get into a more systematic approach to choosing the right screw size for your application. Other lengths and modules must be agreed separately. Before jumping in, though, a quick answer in case you are looking for an answer to the most common situation. However, considering that 2×4 is one of the most common board sizes, I’ll give you some specific advice about what screws to use in selected situations. c�BPj���i�1�����
C��47S+[5N"�F���1T��y�%�z���=���^�` Type of wood: Hardwoods (walnut, etc.) ]�3� �@���_
�2$i�3�^{�Ő��&)`�V�-����#釽��F@�D�H�ao)$�h��I�BR-�#釽������. Actual size will be smaller than listed nominal size do to loss of material when run through planer. The second category, "actual," is the size of the stud … If it’s structural, make sure to use stronger screws, or even consider using nails. Also, if it’s a larger job, make sure you are following your local regulations. Save my name, email, and website in this browser for the next time I comment. Dimensions mean nominal sizes with the moisture content of the sawn timber at 20%. The perfect screw to fasten your 2×4 with will depend on a variety of factors many of which I listed above. The standard measurements of sawn, dimensioned and all-round planed timber are shown in the following tables: MOST COMMON CROSS-SECTIONAL DIMENSIONS FOR SAWN TIMBER, JH = usually done by splitting afterwards, whereby the width is 2 mm less that the nominal size, MOST COMMON CROSS-SECTIONAL DIMENSIONS FOR DIMENSIONED SAWN TIMBER, MOST COMMON CROSS-SECTIONAL DIMENSIONS FOR ALL-ROUND PLANED SAWN TIMBER, AddressPuuinfo Ltd. Snellmaninkatu 13, 00170 Helsinki, Finlandwww.puuinfo.fi, Emailinfo@puuinfo.fiSee personal email addresses here, Standard sizes: thicknesses, widths and lengths, Most common uses for quality classes of sawn timber, Strong wood from the northern coniferous forest belt, Comparison of properties with North American and Japanese wood, Properties and benefits of nordic spruce and pine, Uniform recommendations for Finnish large wooden buildings, Structural details of Finnish log construction, The effects of wooden surfaces as heat stabiliser, Scientific data on the health effects of pine and spruce, The use of wood can be considerably increased, Carbon is bound in wood structures for a long time, Wood product production produces more energy than it consumes, Timber construction as an enabler of low-carbon property development, y-merkki_logo_vaaka_englanti_nega_rgb.png, suomalaistapalvelua_englanti_nega_rgb.png. Lumber charts are typically broken down into two categories. F��N^6Q�ָ>��<
����c��S8Y3������ hz(3y~B���|IW�K��>���'o�?�}����?JqP�3��AQ Keep in mind, though, that it’s just a rule of thumb. %PDF-1.3 Before that, though, here’s a quick rule of thumb you can refer to. The load equations presented in this chapter apply for bright, smooth, common steel wire nails driven into wood when there is no visible splitting. �-&��X_��AŤW�xydJ�h��qrCm��+��ȔC��� /7�'�rFF`�E��x�F9`3T�Ԍ|9���>^n�O4�匌��Ce�/7�'�rjF�Fp_/7�'�rFF��aB���rC}��+�f������rC}��-gd4_�Sg���D#Wo��}}��P�hd���G����P�h��ḩ>Z��h�X��`d4_�z?rC}��-�j�Q� /7�'�r�F��Q�
rC}ԠU-���Vk��Y��U��Ձ'�y�P�P�j�@�HV�K������U��2ռ�L>� ɪI(�b`r/q�J%���U�@-���@��������� �,��V��%�X$�$�Zh5j�@���bUĀ�bCH8E��"M�b�(���σA���3r��"���I�e>P��B%)��P�N�Qn�������k�QC�$�^椭q} yBs���˕0J��)Ⱥ�L�qU�/�.�u���>�@�ƇS���r#N^&���X��MR����d��)Ȳ:eK�Q���{Y��:�p^� ��ȇS�}8���'/τS>���I[��p ��409Ϡ��0�dDhl eDLyD�Se)�����[d�������X�K�������
�[�ݭ����� Considering that rule and the fact that a finished 2×4 is 1.5 x 3.5 inches, you would need a 4.5 inches long screw to attach it to another piece of wood. xڵ]K�ۺ���W��qR��x?�'7������J��%��D[��͝_?x$ As such, if you are screwing through a hardwood piece, you will want to either go with a thinner screw or drill a pilot hole through the hardwood board. L. W. WOOD, Engineer 2 Forest Service, U.S. Department of Agriculture Summary Lumber size standards came into being almost a century ago to meet the need for a common understanding between the mill and markets that were separated by increasing distances of rail or water transportation. Your email address will not be published. �,�5����� @��/�;�CL]I %APx��?���p�ps����l�� Or so thick that it splits your board. !���×
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��J If it needs to be able to withstand lateral load (twisting), make sure to use thicker screws or nails. * Be sure to install the proper steering carbide to the amount of studs installed. If you are joining two 2x4s face-to-face, I recommend using either 2.5-inch or 3-inch screws. Structural importance: You should consider whether your application is cosmetic or structural. Shaded values are limited by the perpendicular-to-grain bearing load, P c ⊥, when posts bear on wood sill plates. A precut/milled wood stud is 2 inches by 4 inches before milling. If you are joining two 2x4s using pocket holes, you can use 2.5-inch screws just like you would when joining the boards face-to-face. If you are looking to join 2x4s, the best screw size to use in most cases is 2.5 inches long, gauge 8 or 9. In other words, you can place the screw deeper in your top piece. After all, while a picture frame falling off the wall would cause relatively minor damage, a shed you built in your garden falling apart could have more serious consequences. 7–1). 2 0 obj There are some criteria that are more important than others, and so I sorted them roughly in the order of importance. Instead, you will have to decide what the best size for your application is. After all, if you followed it literally, your screw would be sticking out of your workpiece anytime you tried to join two pieces of the same thickness. If you want to change the ratio of the length of the screw in the two pieces, you can use counter-sink holes.
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